From: Radek Czajka <rczajka@rczajka.pl>
Date: Wed, 27 Jan 2021 09:53:07 +0000 (+0100)
Subject: Content warnings.
X-Git-Url: https://git.mdrn.pl/wolnelektury.git/commitdiff_plain/9574b970bdd6e28fc6178b736e8e17dfca15fd4e

Content warnings.
---

diff --git a/requirements/requirements.txt b/requirements/requirements.txt
index f1b21fa83..225b205de 100644
--- a/requirements/requirements.txt
+++ b/requirements/requirements.txt
@@ -45,7 +45,7 @@ mutagen>=1.31
 sorl-thumbnail==12.5.0
 
 # home-brewed & dependencies
-librarian==1.10
+librarian==1.12
 
 # celery tasks
 celery[redis]==4.4.7
diff --git a/src/catalogue/locale/de/LC_MESSAGES/django.po b/src/catalogue/locale/de/LC_MESSAGES/django.po
index f4a7ec6e5..c3b876faf 100644
--- a/src/catalogue/locale/de/LC_MESSAGES/django.po
+++ b/src/catalogue/locale/de/LC_MESSAGES/django.po
@@ -199,7 +199,7 @@ msgstr "Beschreibung"
 msgid "abstract"
 msgstr ""
 
-#: catalogue/models/book.py:66 catalogue/models/bookmedia.py:34
+#: catalogue/models/book.py:66 catalogue/models/bookmedia.py:40
 #: catalogue/models/tag.py:71 catalogue/models/tag.py:72
 msgid "creation date"
 msgstr "Erstellungsdatum"
@@ -214,7 +214,7 @@ msgstr "Erstellungsdatum"
 msgid "parent number"
 msgstr "Elternnummer"
 
-#: catalogue/models/book.py:69 catalogue/models/bookmedia.py:35
+#: catalogue/models/book.py:69 catalogue/models/bookmedia.py:41
 msgid "extra information"
 msgstr "zusätzliche Informationen"
 
@@ -284,36 +284,36 @@ msgstr "Buch %s ist bereits vorhanden"
 msgid "This work needs modernisation"
 msgstr ""
 
-#: catalogue/models/book.py:932 catalogue/models/bookmedia.py:27
+#: catalogue/models/book.py:932 catalogue/models/bookmedia.py:33
 #, python-format
 msgid "%s file"
 msgstr "%s XML-Datei"
 
-#: catalogue/models/bookmedia.py:29
+#: catalogue/models/bookmedia.py:35
 msgid "type"
 msgstr "Typ"
 
-#: catalogue/models/bookmedia.py:30 catalogue/models/source.py:11
+#: catalogue/models/bookmedia.py:36 catalogue/models/source.py:11
 #: catalogue/models/tag.py:56
 msgid "name"
 msgstr "Name"
 
-#: catalogue/models/bookmedia.py:31
+#: catalogue/models/bookmedia.py:37
 #, fuzzy
 #| msgid "name"
 msgid "part name"
 msgstr "Name"
 
-#: catalogue/models/bookmedia.py:32
+#: catalogue/models/bookmedia.py:38
 msgid "index"
 msgstr ""
 
-#: catalogue/models/bookmedia.py:33
+#: catalogue/models/bookmedia.py:39
 #, fuzzy
 msgid "file"
 msgstr "XML-Datei"
 
-#: catalogue/models/bookmedia.py:44 catalogue/models/bookmedia.py:45
+#: catalogue/models/bookmedia.py:50 catalogue/models/bookmedia.py:51
 msgid "book media"
 msgstr "book media"
 
@@ -572,11 +572,11 @@ msgstr ""
 msgid "Language"
 msgstr "Sprachenkode"
 
-#: catalogue/templates/catalogue/book_short.html:111
+#: catalogue/templates/catalogue/book_short.html:112
 msgid "Read online"
 msgstr "Online lesen"
 
-#: catalogue/templates/catalogue/book_short.html:114
+#: catalogue/templates/catalogue/book_short.html:123
 msgid ""
 "Cena książki w druku cyfrowym jest zależna od liczby stron.<br>Przed zakupem "
 "upewnij się, że cena druku na żądanie jest dla Ciebie odpowiednia."
@@ -584,24 +584,24 @@ msgid ""
 "bezpłatnie."
 msgstr ""
 
-#: catalogue/templates/catalogue/book_short.html:114
+#: catalogue/templates/catalogue/book_short.html:123
 msgid "Print on demand –"
 msgstr ""
 
-#: catalogue/templates/catalogue/book_short.html:119
-#: catalogue/templates/catalogue/custom_pdf_form.html:18 catalogue/views.py:401
+#: catalogue/templates/catalogue/book_short.html:128
+#: catalogue/templates/catalogue/custom_pdf_form.html:18 catalogue/views.py:404
 msgid "Download"
 msgstr "Herunterladen"
 
-#: catalogue/templates/catalogue/book_short.html:133
+#: catalogue/templates/catalogue/book_short.html:142
 msgid "more"
 msgstr ""
 
-#: catalogue/templates/catalogue/book_short.html:144
+#: catalogue/templates/catalogue/book_short.html:153
 msgid "less"
 msgstr ""
 
-#: catalogue/templates/catalogue/book_short.html:150
+#: catalogue/templates/catalogue/book_short.html:161
 msgid "For now this work is only available for our subscribers."
 msgstr ""
 
@@ -631,20 +631,20 @@ msgstr "Zeige die Fußnoten nicht"
 msgid "References"
 msgstr ""
 
-#: catalogue/templates/catalogue/book_text.html:93
+#: catalogue/templates/catalogue/book_text.html:96
 #: catalogue/templates/catalogue/viewer_base.html:54
 msgid "Close"
 msgstr ""
 
-#: catalogue/templates/catalogue/book_text.html:94
+#: catalogue/templates/catalogue/book_text.html:97
 msgid "Please wait..."
 msgstr ""
 
-#: catalogue/templates/catalogue/book_text.html:149
+#: catalogue/templates/catalogue/book_text.html:152
 msgid "Other versions of the book"
 msgstr ""
 
-#: catalogue/templates/catalogue/book_text.html:150
+#: catalogue/templates/catalogue/book_text.html:153
 msgid "Close the other version"
 msgstr ""
 
@@ -703,7 +703,7 @@ msgstr[1] ""
 msgid "All collections"
 msgstr "Sammlungen"
 
-#: catalogue/templates/catalogue/custom_pdf_form.html:5 catalogue/views.py:400
+#: catalogue/templates/catalogue/custom_pdf_form.html:5 catalogue/views.py:403
 msgid "Download custom PDF"
 msgstr "PDF-Datei herunterladen"
 
@@ -867,6 +867,10 @@ msgstr "Sorry! Suchfrage muss zumindest zwei Buchstaben enthalten"
 msgid "Sorry! Search query must have at least two characters."
 msgstr "Sorry! Suchfrage muss zumindest zwei Buchstaben enthalten"
 
+#: catalogue/templates/catalogue/snippets/content_warning.html:4
+msgid "Caution: text contains"
+msgstr ""
+
 #: catalogue/templates/catalogue/snippets/custom_pdf_link_li.html:3
 #, fuzzy
 msgid "Download a custom PDF"
@@ -969,7 +973,13 @@ msgstr ""
 msgid "Loading"
 msgstr "Zeilenabstand"
 
-#: catalogue/views.py:351
+#: catalogue/templatetags/catalogue_tags.py:504
+#, fuzzy
+#| msgid "language code"
+msgid "vulgar language"
+msgstr "Sprachenkode"
+
+#: catalogue/views.py:354
 #, python-format
 msgid ""
 "An error occurred: %(exception)s\n"
@@ -980,11 +990,11 @@ msgstr ""
 "\n"
 "%(tb)s"
 
-#: catalogue/views.py:356
+#: catalogue/views.py:359
 msgid "Book imported successfully"
 msgstr "Buch wurde erfolgreich importiert"
 
-#: catalogue/views.py:357
+#: catalogue/views.py:360
 #, python-format
 msgid "Error importing file: %r"
 msgstr "Fehler beim Importieren der Datei: %r"
diff --git a/src/catalogue/locale/en/LC_MESSAGES/django.po b/src/catalogue/locale/en/LC_MESSAGES/django.po
index 932a6dffd..ba81501f2 100644
--- a/src/catalogue/locale/en/LC_MESSAGES/django.po
+++ b/src/catalogue/locale/en/LC_MESSAGES/django.po
@@ -199,7 +199,7 @@ msgstr "Description"
 msgid "abstract"
 msgstr ""
 
-#: catalogue/models/book.py:66 catalogue/models/bookmedia.py:34
+#: catalogue/models/book.py:66 catalogue/models/bookmedia.py:40
 #: catalogue/models/tag.py:71 catalogue/models/tag.py:72
 msgid "creation date"
 msgstr "creation date"
@@ -214,7 +214,7 @@ msgstr "creation date"
 msgid "parent number"
 msgstr "Parent number"
 
-#: catalogue/models/book.py:69 catalogue/models/bookmedia.py:35
+#: catalogue/models/book.py:69 catalogue/models/bookmedia.py:41
 msgid "extra information"
 msgstr "Additional information"
 
@@ -284,35 +284,35 @@ msgstr "Book %s already exists"
 msgid "This work needs modernisation"
 msgstr ""
 
-#: catalogue/models/book.py:932 catalogue/models/bookmedia.py:27
+#: catalogue/models/book.py:932 catalogue/models/bookmedia.py:33
 #, python-format
 msgid "%s file"
 msgstr "%s file"
 
-#: catalogue/models/bookmedia.py:29
+#: catalogue/models/bookmedia.py:35
 msgid "type"
 msgstr "type"
 
-#: catalogue/models/bookmedia.py:30 catalogue/models/source.py:11
+#: catalogue/models/bookmedia.py:36 catalogue/models/source.py:11
 #: catalogue/models/tag.py:56
 msgid "name"
 msgstr "name"
 
-#: catalogue/models/bookmedia.py:31
+#: catalogue/models/bookmedia.py:37
 #, fuzzy
 #| msgid "name"
 msgid "part name"
 msgstr "name"
 
-#: catalogue/models/bookmedia.py:32
+#: catalogue/models/bookmedia.py:38
 msgid "index"
 msgstr ""
 
-#: catalogue/models/bookmedia.py:33
+#: catalogue/models/bookmedia.py:39
 msgid "file"
 msgstr "XML file"
 
-#: catalogue/models/bookmedia.py:44 catalogue/models/bookmedia.py:45
+#: catalogue/models/bookmedia.py:50 catalogue/models/bookmedia.py:51
 msgid "book media"
 msgstr "book media"
 
@@ -574,11 +574,11 @@ msgstr ""
 msgid "Language"
 msgstr "language code"
 
-#: catalogue/templates/catalogue/book_short.html:111
+#: catalogue/templates/catalogue/book_short.html:112
 msgid "Read online"
 msgstr "Read online"
 
-#: catalogue/templates/catalogue/book_short.html:114
+#: catalogue/templates/catalogue/book_short.html:123
 msgid ""
 "Cena książki w druku cyfrowym jest zależna od liczby stron.<br>Przed zakupem "
 "upewnij się, że cena druku na żądanie jest dla Ciebie odpowiednia."
@@ -586,24 +586,24 @@ msgid ""
 "bezpłatnie."
 msgstr ""
 
-#: catalogue/templates/catalogue/book_short.html:114
+#: catalogue/templates/catalogue/book_short.html:123
 msgid "Print on demand –"
 msgstr ""
 
-#: catalogue/templates/catalogue/book_short.html:119
-#: catalogue/templates/catalogue/custom_pdf_form.html:18 catalogue/views.py:401
+#: catalogue/templates/catalogue/book_short.html:128
+#: catalogue/templates/catalogue/custom_pdf_form.html:18 catalogue/views.py:404
 msgid "Download"
 msgstr "Download"
 
-#: catalogue/templates/catalogue/book_short.html:133
+#: catalogue/templates/catalogue/book_short.html:142
 msgid "more"
 msgstr ""
 
-#: catalogue/templates/catalogue/book_short.html:144
+#: catalogue/templates/catalogue/book_short.html:153
 msgid "less"
 msgstr ""
 
-#: catalogue/templates/catalogue/book_short.html:150
+#: catalogue/templates/catalogue/book_short.html:161
 msgid "For now this work is only available for our subscribers."
 msgstr ""
 
@@ -633,20 +633,20 @@ msgstr "Don't show footnotes"
 msgid "References"
 msgstr ""
 
-#: catalogue/templates/catalogue/book_text.html:93
+#: catalogue/templates/catalogue/book_text.html:96
 #: catalogue/templates/catalogue/viewer_base.html:54
 msgid "Close"
 msgstr ""
 
-#: catalogue/templates/catalogue/book_text.html:94
+#: catalogue/templates/catalogue/book_text.html:97
 msgid "Please wait..."
 msgstr ""
 
-#: catalogue/templates/catalogue/book_text.html:149
+#: catalogue/templates/catalogue/book_text.html:152
 msgid "Other versions of the book"
 msgstr ""
 
-#: catalogue/templates/catalogue/book_text.html:150
+#: catalogue/templates/catalogue/book_text.html:153
 msgid "Close the other version"
 msgstr ""
 
@@ -705,7 +705,7 @@ msgstr[1] ""
 msgid "All collections"
 msgstr "collections"
 
-#: catalogue/templates/catalogue/custom_pdf_form.html:5 catalogue/views.py:400
+#: catalogue/templates/catalogue/custom_pdf_form.html:5 catalogue/views.py:403
 msgid "Download custom PDF"
 msgstr "Download custom PDF"
 
@@ -869,6 +869,10 @@ msgstr "Sorry! Search query must have at least two characters."
 msgid "Sorry! Search query must have at least two characters."
 msgstr "Sorry! Search query must have at least two characters."
 
+#: catalogue/templates/catalogue/snippets/content_warning.html:4
+msgid "Caution: text contains"
+msgstr ""
+
 #: catalogue/templates/catalogue/snippets/custom_pdf_link_li.html:3
 msgid "Download a custom PDF"
 msgstr "Download a custom PDF"
@@ -970,7 +974,13 @@ msgstr ""
 msgid "Loading"
 msgstr "Leading"
 
-#: catalogue/views.py:351
+#: catalogue/templatetags/catalogue_tags.py:504
+#, fuzzy
+#| msgid "language code"
+msgid "vulgar language"
+msgstr "language code"
+
+#: catalogue/views.py:354
 #, python-format
 msgid ""
 "An error occurred: %(exception)s\n"
@@ -981,11 +991,11 @@ msgstr ""
 "\n"
 "%(tb)s"
 
-#: catalogue/views.py:356
+#: catalogue/views.py:359
 msgid "Book imported successfully"
 msgstr "Book imported succesfully"
 
-#: catalogue/views.py:357
+#: catalogue/views.py:360
 #, python-format
 msgid "Error importing file: %r"
 msgstr "An error occured while importing file: %r"
diff --git a/src/catalogue/locale/es/LC_MESSAGES/django.po b/src/catalogue/locale/es/LC_MESSAGES/django.po
index 471186066..4e80a3dce 100644
--- a/src/catalogue/locale/es/LC_MESSAGES/django.po
+++ b/src/catalogue/locale/es/LC_MESSAGES/django.po
@@ -199,7 +199,7 @@ msgstr "descripción"
 msgid "abstract"
 msgstr ""
 
-#: catalogue/models/book.py:66 catalogue/models/bookmedia.py:34
+#: catalogue/models/book.py:66 catalogue/models/bookmedia.py:40
 #: catalogue/models/tag.py:71 catalogue/models/tag.py:72
 msgid "creation date"
 msgstr "fecha de creación"
@@ -214,7 +214,7 @@ msgstr "fecha de creación"
 msgid "parent number"
 msgstr "cifra matriz"
 
-#: catalogue/models/book.py:69 catalogue/models/bookmedia.py:35
+#: catalogue/models/book.py:69 catalogue/models/bookmedia.py:41
 msgid "extra information"
 msgstr "información adicional"
 
@@ -284,35 +284,35 @@ msgstr "Libro %s ya existe"
 msgid "This work needs modernisation"
 msgstr ""
 
-#: catalogue/models/book.py:932 catalogue/models/bookmedia.py:27
+#: catalogue/models/book.py:932 catalogue/models/bookmedia.py:33
 #, python-format
 msgid "%s file"
 msgstr "%s archivo"
 
-#: catalogue/models/bookmedia.py:29
+#: catalogue/models/bookmedia.py:35
 msgid "type"
 msgstr "tipo"
 
-#: catalogue/models/bookmedia.py:30 catalogue/models/source.py:11
+#: catalogue/models/bookmedia.py:36 catalogue/models/source.py:11
 #: catalogue/models/tag.py:56
 msgid "name"
 msgstr "nombre"
 
-#: catalogue/models/bookmedia.py:31
+#: catalogue/models/bookmedia.py:37
 #, fuzzy
 #| msgid "name"
 msgid "part name"
 msgstr "nombre"
 
-#: catalogue/models/bookmedia.py:32
+#: catalogue/models/bookmedia.py:38
 msgid "index"
 msgstr ""
 
-#: catalogue/models/bookmedia.py:33
+#: catalogue/models/bookmedia.py:39
 msgid "file"
 msgstr "archivo"
 
-#: catalogue/models/bookmedia.py:44 catalogue/models/bookmedia.py:45
+#: catalogue/models/bookmedia.py:50 catalogue/models/bookmedia.py:51
 msgid "book media"
 msgstr "los medios de el libro"
 
@@ -579,11 +579,11 @@ msgstr ""
 msgid "Language"
 msgstr "código de idioma"
 
-#: catalogue/templates/catalogue/book_short.html:111
+#: catalogue/templates/catalogue/book_short.html:112
 msgid "Read online"
 msgstr "Leer en línea"
 
-#: catalogue/templates/catalogue/book_short.html:114
+#: catalogue/templates/catalogue/book_short.html:123
 msgid ""
 "Cena książki w druku cyfrowym jest zależna od liczby stron.<br>Przed zakupem "
 "upewnij się, że cena druku na żądanie jest dla Ciebie odpowiednia."
@@ -591,24 +591,24 @@ msgid ""
 "bezpłatnie."
 msgstr ""
 
-#: catalogue/templates/catalogue/book_short.html:114
+#: catalogue/templates/catalogue/book_short.html:123
 msgid "Print on demand –"
 msgstr ""
 
-#: catalogue/templates/catalogue/book_short.html:119
-#: catalogue/templates/catalogue/custom_pdf_form.html:18 catalogue/views.py:401
+#: catalogue/templates/catalogue/book_short.html:128
+#: catalogue/templates/catalogue/custom_pdf_form.html:18 catalogue/views.py:404
 msgid "Download"
 msgstr "Descargar"
 
-#: catalogue/templates/catalogue/book_short.html:133
+#: catalogue/templates/catalogue/book_short.html:142
 msgid "more"
 msgstr ""
 
-#: catalogue/templates/catalogue/book_short.html:144
+#: catalogue/templates/catalogue/book_short.html:153
 msgid "less"
 msgstr ""
 
-#: catalogue/templates/catalogue/book_short.html:150
+#: catalogue/templates/catalogue/book_short.html:161
 msgid "For now this work is only available for our subscribers."
 msgstr ""
 
@@ -639,20 +639,20 @@ msgstr "No mostres notas a pie de página"
 msgid "References"
 msgstr ""
 
-#: catalogue/templates/catalogue/book_text.html:93
+#: catalogue/templates/catalogue/book_text.html:96
 #: catalogue/templates/catalogue/viewer_base.html:54
 msgid "Close"
 msgstr ""
 
-#: catalogue/templates/catalogue/book_text.html:94
+#: catalogue/templates/catalogue/book_text.html:97
 msgid "Please wait..."
 msgstr ""
 
-#: catalogue/templates/catalogue/book_text.html:149
+#: catalogue/templates/catalogue/book_text.html:152
 msgid "Other versions of the book"
 msgstr ""
 
-#: catalogue/templates/catalogue/book_text.html:150
+#: catalogue/templates/catalogue/book_text.html:153
 msgid "Close the other version"
 msgstr ""
 
@@ -711,7 +711,7 @@ msgstr[1] ""
 msgid "All collections"
 msgstr "colecciones"
 
-#: catalogue/templates/catalogue/custom_pdf_form.html:5 catalogue/views.py:400
+#: catalogue/templates/catalogue/custom_pdf_form.html:5 catalogue/views.py:403
 msgid "Download custom PDF"
 msgstr "Descarga PDF personalizado"
 
@@ -880,6 +880,10 @@ msgstr ""
 "¡Lo siento! La consulta de búsqueda tiene que consistir de dos caracteres "
 "como mínimo."
 
+#: catalogue/templates/catalogue/snippets/content_warning.html:4
+msgid "Caution: text contains"
+msgstr ""
+
 #: catalogue/templates/catalogue/snippets/custom_pdf_link_li.html:3
 msgid "Download a custom PDF"
 msgstr "Descarga un PDF personalisado"
@@ -981,9 +985,15 @@ msgstr ""
 msgid "Loading"
 msgstr "Interlineado"
 
+#: catalogue/templatetags/catalogue_tags.py:504
+#, fuzzy
+#| msgid "language code"
+msgid "vulgar language"
+msgstr "código de idioma"
+
 # msgid "Today is %(month)s, %(day)s."
 # msgstr "Hoy es el %(día)s de %(mes)es"
-#: catalogue/views.py:351
+#: catalogue/views.py:354
 #, python-format
 msgid ""
 "An error occurred: %(exception)s\n"
@@ -994,11 +1004,11 @@ msgstr ""
 "\n"
 "%(tb)s"
 
-#: catalogue/views.py:356
+#: catalogue/views.py:359
 msgid "Book imported successfully"
 msgstr "El libro ha sido importado con éxito"
 
-#: catalogue/views.py:357
+#: catalogue/views.py:360
 #, python-format
 msgid "Error importing file: %r"
 msgstr "Ha ocurrido un error al cargar el archivo: %r"
diff --git a/src/catalogue/locale/fr/LC_MESSAGES/django.po b/src/catalogue/locale/fr/LC_MESSAGES/django.po
index f7fe633b9..77752023a 100644
--- a/src/catalogue/locale/fr/LC_MESSAGES/django.po
+++ b/src/catalogue/locale/fr/LC_MESSAGES/django.po
@@ -198,7 +198,7 @@ msgstr "description"
 msgid "abstract"
 msgstr ""
 
-#: catalogue/models/book.py:66 catalogue/models/bookmedia.py:34
+#: catalogue/models/book.py:66 catalogue/models/bookmedia.py:40
 #: catalogue/models/tag.py:71 catalogue/models/tag.py:72
 msgid "creation date"
 msgstr "date de création"
@@ -213,7 +213,7 @@ msgstr "date de création"
 msgid "parent number"
 msgstr "nombre de parent"
 
-#: catalogue/models/book.py:69 catalogue/models/bookmedia.py:35
+#: catalogue/models/book.py:69 catalogue/models/bookmedia.py:41
 msgid "extra information"
 msgstr "information supplémentaire"
 
@@ -283,35 +283,35 @@ msgstr "Livre %s existe déjà"
 msgid "This work needs modernisation"
 msgstr ""
 
-#: catalogue/models/book.py:932 catalogue/models/bookmedia.py:27
+#: catalogue/models/book.py:932 catalogue/models/bookmedia.py:33
 #, python-format
 msgid "%s file"
 msgstr "fichier %s"
 
-#: catalogue/models/bookmedia.py:29
+#: catalogue/models/bookmedia.py:35
 msgid "type"
 msgstr "type"
 
-#: catalogue/models/bookmedia.py:30 catalogue/models/source.py:11
+#: catalogue/models/bookmedia.py:36 catalogue/models/source.py:11
 #: catalogue/models/tag.py:56
 msgid "name"
 msgstr "nom"
 
-#: catalogue/models/bookmedia.py:31
+#: catalogue/models/bookmedia.py:37
 #, fuzzy
 #| msgid "name"
 msgid "part name"
 msgstr "nom"
 
-#: catalogue/models/bookmedia.py:32
+#: catalogue/models/bookmedia.py:38
 msgid "index"
 msgstr ""
 
-#: catalogue/models/bookmedia.py:33
+#: catalogue/models/bookmedia.py:39
 msgid "file"
 msgstr "fichier"
 
-#: catalogue/models/bookmedia.py:44 catalogue/models/bookmedia.py:45
+#: catalogue/models/bookmedia.py:50 catalogue/models/bookmedia.py:51
 msgid "book media"
 msgstr "book media"
 
@@ -573,11 +573,11 @@ msgstr ""
 msgid "Language"
 msgstr "code de langue"
 
-#: catalogue/templates/catalogue/book_short.html:111
+#: catalogue/templates/catalogue/book_short.html:112
 msgid "Read online"
 msgstr "Lire en ligne"
 
-#: catalogue/templates/catalogue/book_short.html:114
+#: catalogue/templates/catalogue/book_short.html:123
 msgid ""
 "Cena książki w druku cyfrowym jest zależna od liczby stron.<br>Przed zakupem "
 "upewnij się, że cena druku na żądanie jest dla Ciebie odpowiednia."
@@ -585,24 +585,24 @@ msgid ""
 "bezpłatnie."
 msgstr ""
 
-#: catalogue/templates/catalogue/book_short.html:114
+#: catalogue/templates/catalogue/book_short.html:123
 msgid "Print on demand –"
 msgstr ""
 
-#: catalogue/templates/catalogue/book_short.html:119
-#: catalogue/templates/catalogue/custom_pdf_form.html:18 catalogue/views.py:401
+#: catalogue/templates/catalogue/book_short.html:128
+#: catalogue/templates/catalogue/custom_pdf_form.html:18 catalogue/views.py:404
 msgid "Download"
 msgstr "Téléchargez"
 
-#: catalogue/templates/catalogue/book_short.html:133
+#: catalogue/templates/catalogue/book_short.html:142
 msgid "more"
 msgstr ""
 
-#: catalogue/templates/catalogue/book_short.html:144
+#: catalogue/templates/catalogue/book_short.html:153
 msgid "less"
 msgstr ""
 
-#: catalogue/templates/catalogue/book_short.html:150
+#: catalogue/templates/catalogue/book_short.html:161
 msgid "For now this work is only available for our subscribers."
 msgstr ""
 
@@ -632,20 +632,20 @@ msgstr "Ne montre pas d'annotations"
 msgid "References"
 msgstr ""
 
-#: catalogue/templates/catalogue/book_text.html:93
+#: catalogue/templates/catalogue/book_text.html:96
 #: catalogue/templates/catalogue/viewer_base.html:54
 msgid "Close"
 msgstr ""
 
-#: catalogue/templates/catalogue/book_text.html:94
+#: catalogue/templates/catalogue/book_text.html:97
 msgid "Please wait..."
 msgstr ""
 
-#: catalogue/templates/catalogue/book_text.html:149
+#: catalogue/templates/catalogue/book_text.html:152
 msgid "Other versions of the book"
 msgstr ""
 
-#: catalogue/templates/catalogue/book_text.html:150
+#: catalogue/templates/catalogue/book_text.html:153
 msgid "Close the other version"
 msgstr ""
 
@@ -704,7 +704,7 @@ msgstr[1] ""
 msgid "All collections"
 msgstr "collections"
 
-#: catalogue/templates/catalogue/custom_pdf_form.html:5 catalogue/views.py:400
+#: catalogue/templates/catalogue/custom_pdf_form.html:5 catalogue/views.py:403
 msgid "Download custom PDF"
 msgstr "Téléchargez un PDF personnalisé"
 
@@ -873,6 +873,10 @@ msgstr ""
 "Nous sommes désolés, pour effectuer la recherche il faut entrer au moins "
 "deux caractères."
 
+#: catalogue/templates/catalogue/snippets/content_warning.html:4
+msgid "Caution: text contains"
+msgstr ""
+
 #: catalogue/templates/catalogue/snippets/custom_pdf_link_li.html:3
 msgid "Download a custom PDF"
 msgstr "Téléchargez un PDF pérsonnalisé"
@@ -974,9 +978,15 @@ msgstr ""
 msgid "Loading"
 msgstr "Interligne"
 
+#: catalogue/templatetags/catalogue_tags.py:504
+#, fuzzy
+#| msgid "language code"
+msgid "vulgar language"
+msgstr "code de langue"
+
 # msgid "Today is %(month)s, %(day)s."
 # msgstr "Aujourd'hui nous sommes le"
-#: catalogue/views.py:351
+#: catalogue/views.py:354
 #, python-format
 msgid ""
 "An error occurred: %(exception)s\n"
@@ -987,11 +997,11 @@ msgstr ""
 "\n"
 "%(tb)s"
 
-#: catalogue/views.py:356
+#: catalogue/views.py:359
 msgid "Book imported successfully"
 msgstr "Livre importé avec succès"
 
-#: catalogue/views.py:357
+#: catalogue/views.py:360
 #, python-format
 msgid "Error importing file: %r"
 msgstr "Erreur pendant l'importation du fichier: %r"
diff --git a/src/catalogue/locale/it/LC_MESSAGES/django.po b/src/catalogue/locale/it/LC_MESSAGES/django.po
index c3af4c21e..2de547327 100644
--- a/src/catalogue/locale/it/LC_MESSAGES/django.po
+++ b/src/catalogue/locale/it/LC_MESSAGES/django.po
@@ -199,7 +199,7 @@ msgstr "descrizione"
 msgid "abstract"
 msgstr ""
 
-#: catalogue/models/book.py:66 catalogue/models/bookmedia.py:34
+#: catalogue/models/book.py:66 catalogue/models/bookmedia.py:40
 #: catalogue/models/tag.py:71 catalogue/models/tag.py:72
 msgid "creation date"
 msgstr "data di creazione"
@@ -214,7 +214,7 @@ msgstr "data di creazione"
 msgid "parent number"
 msgstr "numero del genitore"
 
-#: catalogue/models/book.py:69 catalogue/models/bookmedia.py:35
+#: catalogue/models/book.py:69 catalogue/models/bookmedia.py:41
 msgid "extra information"
 msgstr " ulteriori informazioni"
 
@@ -284,35 +284,35 @@ msgstr "Il libro %s esiste già"
 msgid "This work needs modernisation"
 msgstr ""
 
-#: catalogue/models/book.py:932 catalogue/models/bookmedia.py:27
+#: catalogue/models/book.py:932 catalogue/models/bookmedia.py:33
 #, python-format
 msgid "%s file"
 msgstr "i %s di file"
 
-#: catalogue/models/bookmedia.py:29
+#: catalogue/models/bookmedia.py:35
 msgid "type"
 msgstr "tipo"
 
-#: catalogue/models/bookmedia.py:30 catalogue/models/source.py:11
+#: catalogue/models/bookmedia.py:36 catalogue/models/source.py:11
 #: catalogue/models/tag.py:56
 msgid "name"
 msgstr "nome"
 
-#: catalogue/models/bookmedia.py:31
+#: catalogue/models/bookmedia.py:37
 #, fuzzy
 #| msgid "name"
 msgid "part name"
 msgstr "nome"
 
-#: catalogue/models/bookmedia.py:32
+#: catalogue/models/bookmedia.py:38
 msgid "index"
 msgstr ""
 
-#: catalogue/models/bookmedia.py:33
+#: catalogue/models/bookmedia.py:39
 msgid "file"
 msgstr "file"
 
-#: catalogue/models/bookmedia.py:44 catalogue/models/bookmedia.py:45
+#: catalogue/models/bookmedia.py:50 catalogue/models/bookmedia.py:51
 msgid "book media"
 msgstr "book media"
 
@@ -576,11 +576,11 @@ msgstr ""
 msgid "Language"
 msgstr "codice della lingua"
 
-#: catalogue/templates/catalogue/book_short.html:111
+#: catalogue/templates/catalogue/book_short.html:112
 msgid "Read online"
 msgstr "Leggi online"
 
-#: catalogue/templates/catalogue/book_short.html:114
+#: catalogue/templates/catalogue/book_short.html:123
 msgid ""
 "Cena książki w druku cyfrowym jest zależna od liczby stron.<br>Przed zakupem "
 "upewnij się, że cena druku na żądanie jest dla Ciebie odpowiednia."
@@ -588,24 +588,24 @@ msgid ""
 "bezpłatnie."
 msgstr ""
 
-#: catalogue/templates/catalogue/book_short.html:114
+#: catalogue/templates/catalogue/book_short.html:123
 msgid "Print on demand –"
 msgstr ""
 
-#: catalogue/templates/catalogue/book_short.html:119
-#: catalogue/templates/catalogue/custom_pdf_form.html:18 catalogue/views.py:401
+#: catalogue/templates/catalogue/book_short.html:128
+#: catalogue/templates/catalogue/custom_pdf_form.html:18 catalogue/views.py:404
 msgid "Download"
 msgstr "Scarica"
 
-#: catalogue/templates/catalogue/book_short.html:133
+#: catalogue/templates/catalogue/book_short.html:142
 msgid "more"
 msgstr ""
 
-#: catalogue/templates/catalogue/book_short.html:144
+#: catalogue/templates/catalogue/book_short.html:153
 msgid "less"
 msgstr ""
 
-#: catalogue/templates/catalogue/book_short.html:150
+#: catalogue/templates/catalogue/book_short.html:161
 msgid "For now this work is only available for our subscribers."
 msgstr ""
 
@@ -635,20 +635,20 @@ msgstr "Non mostrare le note"
 msgid "References"
 msgstr ""
 
-#: catalogue/templates/catalogue/book_text.html:93
+#: catalogue/templates/catalogue/book_text.html:96
 #: catalogue/templates/catalogue/viewer_base.html:54
 msgid "Close"
 msgstr ""
 
-#: catalogue/templates/catalogue/book_text.html:94
+#: catalogue/templates/catalogue/book_text.html:97
 msgid "Please wait..."
 msgstr ""
 
-#: catalogue/templates/catalogue/book_text.html:149
+#: catalogue/templates/catalogue/book_text.html:152
 msgid "Other versions of the book"
 msgstr ""
 
-#: catalogue/templates/catalogue/book_text.html:150
+#: catalogue/templates/catalogue/book_text.html:153
 msgid "Close the other version"
 msgstr ""
 
@@ -707,7 +707,7 @@ msgstr[1] ""
 msgid "All collections"
 msgstr " raccolte"
 
-#: catalogue/templates/catalogue/custom_pdf_form.html:5 catalogue/views.py:400
+#: catalogue/templates/catalogue/custom_pdf_form.html:5 catalogue/views.py:403
 msgid "Download custom PDF"
 msgstr "Scarica PDF personalizzato"
 
@@ -876,6 +876,10 @@ msgstr ""
 "Siamo spiacenti! La ricerca viene effettuata su parole con almeno due "
 "caratteri."
 
+#: catalogue/templates/catalogue/snippets/content_warning.html:4
+msgid "Caution: text contains"
+msgstr ""
+
 #: catalogue/templates/catalogue/snippets/custom_pdf_link_li.html:3
 msgid "Download a custom PDF"
 msgstr " Scarica un PDF personalizzato"
@@ -977,7 +981,13 @@ msgstr ""
 msgid "Loading"
 msgstr "Interlinea"
 
-#: catalogue/views.py:351
+#: catalogue/templatetags/catalogue_tags.py:504
+#, fuzzy
+#| msgid "language code"
+msgid "vulgar language"
+msgstr "codice della lingua"
+
+#: catalogue/views.py:354
 #, python-format
 msgid ""
 "An error occurred: %(exception)s\n"
@@ -988,11 +998,11 @@ msgstr ""
 "\n"
 "%(tb)s"
 
-#: catalogue/views.py:356
+#: catalogue/views.py:359
 msgid "Book imported successfully"
 msgstr "Libro scaricato con successo"
 
-#: catalogue/views.py:357
+#: catalogue/views.py:360
 #, python-format
 msgid "Error importing file: %r"
 msgstr "Errore dell'importazione del file: %r"
diff --git a/src/catalogue/locale/lt/LC_MESSAGES/django.po b/src/catalogue/locale/lt/LC_MESSAGES/django.po
index 101965025..37e5f4961 100644
--- a/src/catalogue/locale/lt/LC_MESSAGES/django.po
+++ b/src/catalogue/locale/lt/LC_MESSAGES/django.po
@@ -199,7 +199,7 @@ msgstr "aprašymas"
 msgid "abstract"
 msgstr ""
 
-#: catalogue/models/book.py:66 catalogue/models/bookmedia.py:34
+#: catalogue/models/book.py:66 catalogue/models/bookmedia.py:40
 #: catalogue/models/tag.py:71 catalogue/models/tag.py:72
 msgid "creation date"
 msgstr "sukūrimo data"
@@ -215,7 +215,7 @@ msgstr "sukūrimo data"
 msgid "parent number"
 msgstr "pirminis numeris"
 
-#: catalogue/models/book.py:69 catalogue/models/bookmedia.py:35
+#: catalogue/models/book.py:69 catalogue/models/bookmedia.py:41
 msgid "extra information"
 msgstr "papildomos informacijos"
 
@@ -285,35 +285,35 @@ msgstr "Knyga %s jau egzistuoja"
 msgid "This work needs modernisation"
 msgstr ""
 
-#: catalogue/models/book.py:932 catalogue/models/bookmedia.py:27
+#: catalogue/models/book.py:932 catalogue/models/bookmedia.py:33
 #, python-format
 msgid "%s file"
 msgstr "%s failas "
 
-#: catalogue/models/bookmedia.py:29
+#: catalogue/models/bookmedia.py:35
 msgid "type"
 msgstr "tipas"
 
-#: catalogue/models/bookmedia.py:30 catalogue/models/source.py:11
+#: catalogue/models/bookmedia.py:36 catalogue/models/source.py:11
 #: catalogue/models/tag.py:56
 msgid "name"
 msgstr "pavadinimas"
 
-#: catalogue/models/bookmedia.py:31
+#: catalogue/models/bookmedia.py:37
 #, fuzzy
 #| msgid "name"
 msgid "part name"
 msgstr "pavadinimas"
 
-#: catalogue/models/bookmedia.py:32
+#: catalogue/models/bookmedia.py:38
 msgid "index"
 msgstr ""
 
-#: catalogue/models/bookmedia.py:33
+#: catalogue/models/bookmedia.py:39
 msgid "file"
 msgstr "failas "
 
-#: catalogue/models/bookmedia.py:44 catalogue/models/bookmedia.py:45
+#: catalogue/models/bookmedia.py:50 catalogue/models/bookmedia.py:51
 msgid "book media"
 msgstr "book media"
 
@@ -576,11 +576,11 @@ msgstr ""
 msgid "Language"
 msgstr "kalbos kodas"
 
-#: catalogue/templates/catalogue/book_short.html:111
+#: catalogue/templates/catalogue/book_short.html:112
 msgid "Read online"
 msgstr "Skaityti online"
 
-#: catalogue/templates/catalogue/book_short.html:114
+#: catalogue/templates/catalogue/book_short.html:123
 msgid ""
 "Cena książki w druku cyfrowym jest zależna od liczby stron.<br>Przed zakupem "
 "upewnij się, że cena druku na żądanie jest dla Ciebie odpowiednia."
@@ -588,24 +588,24 @@ msgid ""
 "bezpłatnie."
 msgstr ""
 
-#: catalogue/templates/catalogue/book_short.html:114
+#: catalogue/templates/catalogue/book_short.html:123
 msgid "Print on demand –"
 msgstr ""
 
-#: catalogue/templates/catalogue/book_short.html:119
-#: catalogue/templates/catalogue/custom_pdf_form.html:18 catalogue/views.py:401
+#: catalogue/templates/catalogue/book_short.html:128
+#: catalogue/templates/catalogue/custom_pdf_form.html:18 catalogue/views.py:404
 msgid "Download"
 msgstr "Atsisiųsti"
 
-#: catalogue/templates/catalogue/book_short.html:133
+#: catalogue/templates/catalogue/book_short.html:142
 msgid "more"
 msgstr ""
 
-#: catalogue/templates/catalogue/book_short.html:144
+#: catalogue/templates/catalogue/book_short.html:153
 msgid "less"
 msgstr ""
 
-#: catalogue/templates/catalogue/book_short.html:150
+#: catalogue/templates/catalogue/book_short.html:161
 msgid "For now this work is only available for our subscribers."
 msgstr ""
 
@@ -635,20 +635,20 @@ msgstr "Nerodyti išnašų"
 msgid "References"
 msgstr ""
 
-#: catalogue/templates/catalogue/book_text.html:93
+#: catalogue/templates/catalogue/book_text.html:96
 #: catalogue/templates/catalogue/viewer_base.html:54
 msgid "Close"
 msgstr ""
 
-#: catalogue/templates/catalogue/book_text.html:94
+#: catalogue/templates/catalogue/book_text.html:97
 msgid "Please wait..."
 msgstr ""
 
-#: catalogue/templates/catalogue/book_text.html:149
+#: catalogue/templates/catalogue/book_text.html:152
 msgid "Other versions of the book"
 msgstr ""
 
-#: catalogue/templates/catalogue/book_text.html:150
+#: catalogue/templates/catalogue/book_text.html:153
 msgid "Close the other version"
 msgstr ""
 
@@ -707,7 +707,7 @@ msgstr[1] ""
 msgid "All collections"
 msgstr "kolekcijos"
 
-#: catalogue/templates/catalogue/custom_pdf_form.html:5 catalogue/views.py:400
+#: catalogue/templates/catalogue/custom_pdf_form.html:5 catalogue/views.py:403
 msgid "Download custom PDF"
 msgstr "Sukurti ir atsisiųsti PDF failą"
 
@@ -874,6 +874,10 @@ msgid "Sorry! Search query must have at least two characters."
 msgstr ""
 "Atsiprašome! Paieškos užklausa turi susidėti mažiausiai iš dviejų simbolių."
 
+#: catalogue/templates/catalogue/snippets/content_warning.html:4
+msgid "Caution: text contains"
+msgstr ""
+
 #: catalogue/templates/catalogue/snippets/custom_pdf_link_li.html:3
 msgid "Download a custom PDF"
 msgstr "Sukurti ir atsisiųsti PDF failą"
@@ -975,7 +979,13 @@ msgstr ""
 msgid "Loading"
 msgstr "eilučių intervalas"
 
-#: catalogue/views.py:351
+#: catalogue/templatetags/catalogue_tags.py:504
+#, fuzzy
+#| msgid "language code"
+msgid "vulgar language"
+msgstr "kalbos kodas"
+
+#: catalogue/views.py:354
 #, python-format
 msgid ""
 "An error occurred: %(exception)s\n"
@@ -986,11 +996,11 @@ msgstr ""
 "\n"
 "%(tb)s"
 
-#: catalogue/views.py:356
+#: catalogue/views.py:359
 msgid "Book imported successfully"
 msgstr "Knyga buvo sėkmingai importuota"
 
-#: catalogue/views.py:357
+#: catalogue/views.py:360
 #, python-format
 msgid "Error importing file: %r"
 msgstr "Importuojant failą įvyko klaida: %r"
diff --git a/src/catalogue/locale/pl/LC_MESSAGES/django.mo b/src/catalogue/locale/pl/LC_MESSAGES/django.mo
index 6012b3589..edd1fa1ac 100644
Binary files a/src/catalogue/locale/pl/LC_MESSAGES/django.mo and b/src/catalogue/locale/pl/LC_MESSAGES/django.mo differ
diff --git a/src/catalogue/locale/pl/LC_MESSAGES/django.po b/src/catalogue/locale/pl/LC_MESSAGES/django.po
index a5ddcbca5..29a62a9dc 100644
--- a/src/catalogue/locale/pl/LC_MESSAGES/django.po
+++ b/src/catalogue/locale/pl/LC_MESSAGES/django.po
@@ -5,7 +5,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: WolneLektury\n"
 "Report-Msgid-Bugs-To: \n"
-"PO-Revision-Date: 2020-11-09 00:53+0100\n"
+"PO-Revision-Date: 2021-01-27 10:47+0100\n"
 "Last-Translator: Radek Czajka <radoslaw.czajka@nowoczesnapolska.org.pl>\n"
 "Language-Team: Fundacja Nowoczesna Polska <fundacja@nowoczesnapolska.org."
 "pl>\n"
@@ -174,7 +174,7 @@ msgstr "opis"
 msgid "abstract"
 msgstr "abstrakt"
 
-#: catalogue/models/book.py:66 catalogue/models/bookmedia.py:34
+#: catalogue/models/book.py:66 catalogue/models/bookmedia.py:40
 #: catalogue/models/tag.py:71 catalogue/models/tag.py:72
 msgid "creation date"
 msgstr "data utworzenia"
@@ -187,7 +187,7 @@ msgstr "data modyfikacji"
 msgid "parent number"
 msgstr "numer rodzica"
 
-#: catalogue/models/book.py:69 catalogue/models/bookmedia.py:35
+#: catalogue/models/book.py:69 catalogue/models/bookmedia.py:41
 msgid "extra information"
 msgstr "dodatkowe informacje"
 
@@ -257,33 +257,33 @@ msgstr "Książka %s już istnieje"
 msgid "This work needs modernisation"
 msgstr "Ten utwór wymaga uwspółcześnienia"
 
-#: catalogue/models/book.py:932 catalogue/models/bookmedia.py:27
+#: catalogue/models/book.py:932 catalogue/models/bookmedia.py:33
 #, python-format
 msgid "%s file"
 msgstr "plik %s"
 
-#: catalogue/models/bookmedia.py:29
+#: catalogue/models/bookmedia.py:35
 msgid "type"
 msgstr "typ"
 
-#: catalogue/models/bookmedia.py:30 catalogue/models/source.py:11
+#: catalogue/models/bookmedia.py:36 catalogue/models/source.py:11
 #: catalogue/models/tag.py:56
 msgid "name"
 msgstr "nazwa"
 
-#: catalogue/models/bookmedia.py:31
+#: catalogue/models/bookmedia.py:37
 msgid "part name"
 msgstr "nazwa części"
 
-#: catalogue/models/bookmedia.py:32
+#: catalogue/models/bookmedia.py:38
 msgid "index"
 msgstr "indeks"
 
-#: catalogue/models/bookmedia.py:33
+#: catalogue/models/bookmedia.py:39
 msgid "file"
 msgstr "plik"
 
-#: catalogue/models/bookmedia.py:44 catalogue/models/bookmedia.py:45
+#: catalogue/models/bookmedia.py:50 catalogue/models/bookmedia.py:51
 msgid "book media"
 msgstr "media książki"
 
@@ -520,11 +520,11 @@ msgstr "Region"
 msgid "Language"
 msgstr "Język"
 
-#: catalogue/templates/catalogue/book_short.html:111
+#: catalogue/templates/catalogue/book_short.html:112
 msgid "Read online"
 msgstr "Czytaj online"
 
-#: catalogue/templates/catalogue/book_short.html:114
+#: catalogue/templates/catalogue/book_short.html:123
 msgid ""
 "Cena książki w druku cyfrowym jest zależna od liczby stron.<br>Przed zakupem "
 "upewnij się, że cena druku na żądanie jest dla Ciebie odpowiednia."
@@ -532,24 +532,24 @@ msgid ""
 "bezpłatnie."
 msgstr ""
 
-#: catalogue/templates/catalogue/book_short.html:114
+#: catalogue/templates/catalogue/book_short.html:123
 msgid "Print on demand –"
 msgstr "Druk na żądanie z"
 
-#: catalogue/templates/catalogue/book_short.html:119
-#: catalogue/templates/catalogue/custom_pdf_form.html:18 catalogue/views.py:401
+#: catalogue/templates/catalogue/book_short.html:128
+#: catalogue/templates/catalogue/custom_pdf_form.html:18 catalogue/views.py:404
 msgid "Download"
 msgstr "Pobierz"
 
-#: catalogue/templates/catalogue/book_short.html:133
+#: catalogue/templates/catalogue/book_short.html:142
 msgid "more"
 msgstr "więcej"
 
-#: catalogue/templates/catalogue/book_short.html:144
+#: catalogue/templates/catalogue/book_short.html:153
 msgid "less"
 msgstr "mniej"
 
-#: catalogue/templates/catalogue/book_short.html:150
+#: catalogue/templates/catalogue/book_short.html:161
 msgid "For now this work is only available for our subscribers."
 msgstr "Jak na razie ten utwór jest dostępny wyłącznie dla naszych Przyjaciół."
 
@@ -577,20 +577,20 @@ msgstr "Przypisy"
 msgid "References"
 msgstr "Odniesienia"
 
-#: catalogue/templates/catalogue/book_text.html:93
+#: catalogue/templates/catalogue/book_text.html:96
 #: catalogue/templates/catalogue/viewer_base.html:54
 msgid "Close"
 msgstr "Zamknij"
 
-#: catalogue/templates/catalogue/book_text.html:94
+#: catalogue/templates/catalogue/book_text.html:97
 msgid "Please wait..."
 msgstr "Proszę czekać…"
 
-#: catalogue/templates/catalogue/book_text.html:149
+#: catalogue/templates/catalogue/book_text.html:152
 msgid "Other versions of the book"
 msgstr "Inne wersje utworu"
 
-#: catalogue/templates/catalogue/book_text.html:150
+#: catalogue/templates/catalogue/book_text.html:153
 msgid "Close the other version"
 msgstr "Zamknij drugą wersję"
 
@@ -642,7 +642,7 @@ msgstr[2] "oraz %(c)s innych"
 msgid "All collections"
 msgstr "Wszystkie kolekcje"
 
-#: catalogue/templates/catalogue/custom_pdf_form.html:5 catalogue/views.py:400
+#: catalogue/templates/catalogue/custom_pdf_form.html:5 catalogue/views.py:403
 msgid "Download custom PDF"
 msgstr "Stwórz własny PDF"
 
@@ -801,6 +801,10 @@ msgstr "Przepraszamy! Zapytanie jest zbyt długie."
 msgid "Sorry! Search query must have at least two characters."
 msgstr "Przepraszamy! Zapytanie musi zawierać co najmniej dwa znaki."
 
+#: catalogue/templates/catalogue/snippets/content_warning.html:4
+msgid "Caution: text contains"
+msgstr "Uwaga, tekst zawiera"
+
 #: catalogue/templates/catalogue/snippets/custom_pdf_link_li.html:3
 msgid "Download a custom PDF"
 msgstr "Stwórz własny plik PDF"
@@ -890,7 +894,11 @@ msgstr "w Culture.pl"
 msgid "Loading"
 msgstr "Ładowanie"
 
-#: catalogue/views.py:351
+#: catalogue/templatetags/catalogue_tags.py:504
+msgid "vulgar language"
+msgstr "wulgaryzmy"
+
+#: catalogue/views.py:354
 #, python-format
 msgid ""
 "An error occurred: %(exception)s\n"
@@ -901,11 +909,11 @@ msgstr ""
 "\n"
 "%(tb)s"
 
-#: catalogue/views.py:356
+#: catalogue/views.py:359
 msgid "Book imported successfully"
 msgstr "Książka zaimportowana"
 
-#: catalogue/views.py:357
+#: catalogue/views.py:360
 #, python-format
 msgid "Error importing file: %r"
 msgstr "Błąd podczas importowania pliku: %r"
diff --git a/src/catalogue/locale/ru/LC_MESSAGES/django.po b/src/catalogue/locale/ru/LC_MESSAGES/django.po
index 5a2238bb4..704d49886 100644
--- a/src/catalogue/locale/ru/LC_MESSAGES/django.po
+++ b/src/catalogue/locale/ru/LC_MESSAGES/django.po
@@ -199,7 +199,7 @@ msgstr "описание"
 msgid "abstract"
 msgstr ""
 
-#: catalogue/models/book.py:66 catalogue/models/bookmedia.py:34
+#: catalogue/models/book.py:66 catalogue/models/bookmedia.py:40
 #: catalogue/models/tag.py:71 catalogue/models/tag.py:72
 msgid "creation date"
 msgstr "дата создания"
@@ -214,7 +214,7 @@ msgstr "дата создания"
 msgid "parent number"
 msgstr "номер родителя"
 
-#: catalogue/models/book.py:69 catalogue/models/bookmedia.py:35
+#: catalogue/models/book.py:69 catalogue/models/bookmedia.py:41
 msgid "extra information"
 msgstr "дополнительная информация"
 
@@ -284,36 +284,36 @@ msgstr "Книга %s уже существует"
 msgid "This work needs modernisation"
 msgstr ""
 
-#: catalogue/models/book.py:932 catalogue/models/bookmedia.py:27
+#: catalogue/models/book.py:932 catalogue/models/bookmedia.py:33
 #, fuzzy, python-format
 msgid "%s file"
 msgstr "XML файл"
 
-#: catalogue/models/bookmedia.py:29
+#: catalogue/models/bookmedia.py:35
 msgid "type"
 msgstr "тип"
 
-#: catalogue/models/bookmedia.py:30 catalogue/models/source.py:11
+#: catalogue/models/bookmedia.py:36 catalogue/models/source.py:11
 #: catalogue/models/tag.py:56
 msgid "name"
 msgstr "название"
 
-#: catalogue/models/bookmedia.py:31
+#: catalogue/models/bookmedia.py:37
 #, fuzzy
 #| msgid "name"
 msgid "part name"
 msgstr "название"
 
-#: catalogue/models/bookmedia.py:32
+#: catalogue/models/bookmedia.py:38
 msgid "index"
 msgstr ""
 
-#: catalogue/models/bookmedia.py:33
+#: catalogue/models/bookmedia.py:39
 #, fuzzy
 msgid "file"
 msgstr "XML файл"
 
-#: catalogue/models/bookmedia.py:44 catalogue/models/bookmedia.py:45
+#: catalogue/models/bookmedia.py:50 catalogue/models/bookmedia.py:51
 msgid "book media"
 msgstr "аудиокнига"
 
@@ -578,11 +578,11 @@ msgstr ""
 msgid "Language"
 msgstr "код языка"
 
-#: catalogue/templates/catalogue/book_short.html:111
+#: catalogue/templates/catalogue/book_short.html:112
 msgid "Read online"
 msgstr "Читать онлайн"
 
-#: catalogue/templates/catalogue/book_short.html:114
+#: catalogue/templates/catalogue/book_short.html:123
 msgid ""
 "Cena książki w druku cyfrowym jest zależna od liczby stron.<br>Przed zakupem "
 "upewnij się, że cena druku na żądanie jest dla Ciebie odpowiednia."
@@ -590,24 +590,24 @@ msgid ""
 "bezpłatnie."
 msgstr ""
 
-#: catalogue/templates/catalogue/book_short.html:114
+#: catalogue/templates/catalogue/book_short.html:123
 msgid "Print on demand –"
 msgstr ""
 
-#: catalogue/templates/catalogue/book_short.html:119
-#: catalogue/templates/catalogue/custom_pdf_form.html:18 catalogue/views.py:401
+#: catalogue/templates/catalogue/book_short.html:128
+#: catalogue/templates/catalogue/custom_pdf_form.html:18 catalogue/views.py:404
 msgid "Download"
 msgstr "Загрузить"
 
-#: catalogue/templates/catalogue/book_short.html:133
+#: catalogue/templates/catalogue/book_short.html:142
 msgid "more"
 msgstr ""
 
-#: catalogue/templates/catalogue/book_short.html:144
+#: catalogue/templates/catalogue/book_short.html:153
 msgid "less"
 msgstr ""
 
-#: catalogue/templates/catalogue/book_short.html:150
+#: catalogue/templates/catalogue/book_short.html:161
 msgid "For now this work is only available for our subscribers."
 msgstr ""
 
@@ -637,20 +637,20 @@ msgstr "Не показывать сноски"
 msgid "References"
 msgstr ""
 
-#: catalogue/templates/catalogue/book_text.html:93
+#: catalogue/templates/catalogue/book_text.html:96
 #: catalogue/templates/catalogue/viewer_base.html:54
 msgid "Close"
 msgstr ""
 
-#: catalogue/templates/catalogue/book_text.html:94
+#: catalogue/templates/catalogue/book_text.html:97
 msgid "Please wait..."
 msgstr ""
 
-#: catalogue/templates/catalogue/book_text.html:149
+#: catalogue/templates/catalogue/book_text.html:152
 msgid "Other versions of the book"
 msgstr ""
 
-#: catalogue/templates/catalogue/book_text.html:150
+#: catalogue/templates/catalogue/book_text.html:153
 msgid "Close the other version"
 msgstr ""
 
@@ -709,7 +709,7 @@ msgstr[1] ""
 msgid "All collections"
 msgstr "сборы"
 
-#: catalogue/templates/catalogue/custom_pdf_form.html:5 catalogue/views.py:400
+#: catalogue/templates/catalogue/custom_pdf_form.html:5 catalogue/views.py:403
 msgid "Download custom PDF"
 msgstr "Скачать PDF пользователя"
 
@@ -876,6 +876,10 @@ msgid "Sorry! Search query must have at least two characters."
 msgstr ""
 "Извините! У искаемого вопроса должны быть по крайней мере два свойства."
 
+#: catalogue/templates/catalogue/snippets/content_warning.html:4
+msgid "Caution: text contains"
+msgstr ""
+
 #: catalogue/templates/catalogue/snippets/custom_pdf_link_li.html:3
 msgid "Download a custom PDF"
 msgstr "Скачать PDF"
@@ -977,7 +981,13 @@ msgstr ""
 msgid "Loading"
 msgstr "Ведение"
 
-#: catalogue/views.py:351
+#: catalogue/templatetags/catalogue_tags.py:504
+#, fuzzy
+#| msgid "language code"
+msgid "vulgar language"
+msgstr "код языка"
+
+#: catalogue/views.py:354
 #, python-format
 msgid ""
 "An error occurred: %(exception)s\n"
@@ -988,11 +998,11 @@ msgstr ""
 "\n"
 "%(tb)s"
 
-#: catalogue/views.py:356
+#: catalogue/views.py:359
 msgid "Book imported successfully"
 msgstr "Вы удачно заимпортировали книгу"
 
-#: catalogue/views.py:357
+#: catalogue/views.py:360
 #, python-format
 msgid "Error importing file: %r"
 msgstr "Ошибка импорта файла: %r"
diff --git a/src/catalogue/locale/uk/LC_MESSAGES/django.po b/src/catalogue/locale/uk/LC_MESSAGES/django.po
index d3787770b..629ca15e2 100644
--- a/src/catalogue/locale/uk/LC_MESSAGES/django.po
+++ b/src/catalogue/locale/uk/LC_MESSAGES/django.po
@@ -198,7 +198,7 @@ msgstr "опис"
 msgid "abstract"
 msgstr ""
 
-#: catalogue/models/book.py:66 catalogue/models/bookmedia.py:34
+#: catalogue/models/book.py:66 catalogue/models/bookmedia.py:40
 #: catalogue/models/tag.py:71 catalogue/models/tag.py:72
 msgid "creation date"
 msgstr "дата створення"
@@ -213,7 +213,7 @@ msgstr "дата створення"
 msgid "parent number"
 msgstr "номер батька"
 
-#: catalogue/models/book.py:69 catalogue/models/bookmedia.py:35
+#: catalogue/models/book.py:69 catalogue/models/bookmedia.py:41
 msgid "extra information"
 msgstr "додаткова інформація"
 
@@ -283,35 +283,35 @@ msgstr "Книжка %s вже існує"
 msgid "This work needs modernisation"
 msgstr ""
 
-#: catalogue/models/book.py:932 catalogue/models/bookmedia.py:27
+#: catalogue/models/book.py:932 catalogue/models/bookmedia.py:33
 #, python-format
 msgid "%s file"
 msgstr "файл %s"
 
-#: catalogue/models/bookmedia.py:29
+#: catalogue/models/bookmedia.py:35
 msgid "type"
 msgstr "тип"
 
-#: catalogue/models/bookmedia.py:30 catalogue/models/source.py:11
+#: catalogue/models/bookmedia.py:36 catalogue/models/source.py:11
 #: catalogue/models/tag.py:56
 msgid "name"
 msgstr "назва"
 
-#: catalogue/models/bookmedia.py:31
+#: catalogue/models/bookmedia.py:37
 #, fuzzy
 #| msgid "name"
 msgid "part name"
 msgstr "назва"
 
-#: catalogue/models/bookmedia.py:32
+#: catalogue/models/bookmedia.py:38
 msgid "index"
 msgstr ""
 
-#: catalogue/models/bookmedia.py:33
+#: catalogue/models/bookmedia.py:39
 msgid "file"
 msgstr "файл"
 
-#: catalogue/models/bookmedia.py:44 catalogue/models/bookmedia.py:45
+#: catalogue/models/bookmedia.py:50 catalogue/models/bookmedia.py:51
 msgid "book media"
 msgstr "book media"
 
@@ -575,11 +575,11 @@ msgstr ""
 msgid "Language"
 msgstr "мовний код"
 
-#: catalogue/templates/catalogue/book_short.html:111
+#: catalogue/templates/catalogue/book_short.html:112
 msgid "Read online"
 msgstr "Читати онлайн"
 
-#: catalogue/templates/catalogue/book_short.html:114
+#: catalogue/templates/catalogue/book_short.html:123
 msgid ""
 "Cena książki w druku cyfrowym jest zależna od liczby stron.<br>Przed zakupem "
 "upewnij się, że cena druku na żądanie jest dla Ciebie odpowiednia."
@@ -587,24 +587,24 @@ msgid ""
 "bezpłatnie."
 msgstr ""
 
-#: catalogue/templates/catalogue/book_short.html:114
+#: catalogue/templates/catalogue/book_short.html:123
 msgid "Print on demand –"
 msgstr ""
 
-#: catalogue/templates/catalogue/book_short.html:119
-#: catalogue/templates/catalogue/custom_pdf_form.html:18 catalogue/views.py:401
+#: catalogue/templates/catalogue/book_short.html:128
+#: catalogue/templates/catalogue/custom_pdf_form.html:18 catalogue/views.py:404
 msgid "Download"
 msgstr "Завантажити"
 
-#: catalogue/templates/catalogue/book_short.html:133
+#: catalogue/templates/catalogue/book_short.html:142
 msgid "more"
 msgstr ""
 
-#: catalogue/templates/catalogue/book_short.html:144
+#: catalogue/templates/catalogue/book_short.html:153
 msgid "less"
 msgstr ""
 
-#: catalogue/templates/catalogue/book_short.html:150
+#: catalogue/templates/catalogue/book_short.html:161
 msgid "For now this work is only available for our subscribers."
 msgstr ""
 
@@ -634,20 +634,20 @@ msgstr "Сховати примітки"
 msgid "References"
 msgstr ""
 
-#: catalogue/templates/catalogue/book_text.html:93
+#: catalogue/templates/catalogue/book_text.html:96
 #: catalogue/templates/catalogue/viewer_base.html:54
 msgid "Close"
 msgstr ""
 
-#: catalogue/templates/catalogue/book_text.html:94
+#: catalogue/templates/catalogue/book_text.html:97
 msgid "Please wait..."
 msgstr ""
 
-#: catalogue/templates/catalogue/book_text.html:149
+#: catalogue/templates/catalogue/book_text.html:152
 msgid "Other versions of the book"
 msgstr ""
 
-#: catalogue/templates/catalogue/book_text.html:150
+#: catalogue/templates/catalogue/book_text.html:153
 msgid "Close the other version"
 msgstr ""
 
@@ -706,7 +706,7 @@ msgstr[1] ""
 msgid "All collections"
 msgstr "колекції"
 
-#: catalogue/templates/catalogue/custom_pdf_form.html:5 catalogue/views.py:400
+#: catalogue/templates/catalogue/custom_pdf_form.html:5 catalogue/views.py:403
 msgid "Download custom PDF"
 msgstr "Завантажити настроюваний PDF"
 
@@ -870,6 +870,10 @@ msgstr "На жаль, для пошуку потрібно ввести щон
 msgid "Sorry! Search query must have at least two characters."
 msgstr "На жаль, для пошуку потрібно ввести щонайменше два знаки."
 
+#: catalogue/templates/catalogue/snippets/content_warning.html:4
+msgid "Caution: text contains"
+msgstr ""
+
 #: catalogue/templates/catalogue/snippets/custom_pdf_link_li.html:3
 msgid "Download a custom PDF"
 msgstr "Завантажити настроюваний PDF"
@@ -971,7 +975,13 @@ msgstr ""
 msgid "Loading"
 msgstr "Leading"
 
-#: catalogue/views.py:351
+#: catalogue/templatetags/catalogue_tags.py:504
+#, fuzzy
+#| msgid "language code"
+msgid "vulgar language"
+msgstr "мовний код"
+
+#: catalogue/views.py:354
 #, python-format
 msgid ""
 "An error occurred: %(exception)s\n"
@@ -982,11 +992,11 @@ msgstr ""
 "\n"
 "%(tb)s"
 
-#: catalogue/views.py:356
+#: catalogue/views.py:359
 msgid "Book imported successfully"
 msgstr "Книжку успішно завантажено"
 
-#: catalogue/views.py:357
+#: catalogue/views.py:360
 #, python-format
 msgid "Error importing file: %r"
 msgstr "Помилка в завантаженні файла: %r"
diff --git a/src/catalogue/templates/catalogue/book_short.html b/src/catalogue/templates/catalogue/book_short.html
index 4c69492f8..1df91ca42 100644
--- a/src/catalogue/templates/catalogue/book_short.html
+++ b/src/catalogue/templates/catalogue/book_short.html
@@ -108,6 +108,7 @@
         <ul class="book-box-tools">
           <li class="book-box-read">
             {% if book.html_file %}
+	    <div>{% content_warning book %}</div>
               <a href="{% url 'book_text' book.slug %}" class="downarrow">{% trans "Read online" %}</a>
             {% endif %}
             {% if book.print_on_demand %}
@@ -152,6 +153,7 @@
             {% trans "For now this work is only available for our subscribers." %}
 	    <a href="/towarzystwo/">Dołącz do Towarzystwa Przyjaciół Wolnych Lektur</a>
 	  </p>
+          <div>{% content_warning book %}</div>
         {% endblock %}
       {% endif %}
       {% endcache %}
diff --git a/src/catalogue/templates/catalogue/book_text.html b/src/catalogue/templates/catalogue/book_text.html
index a771c1778..27601d87d 100644
--- a/src/catalogue/templates/catalogue/book_text.html
+++ b/src/catalogue/templates/catalogue/book_text.html
@@ -82,6 +82,9 @@
       {% if prev %}
         <a style="display:inline-block;padding: 1em;" href="{% url 'book_text' prev.slug %}">&larr;&nbsp;{{ prev.title }}</a>
       {% endif %}
+      <div style="text-align:center; margin-top:1em;">
+      {% content_warning book %}
+      </div>
       <div style="clear:both;"></div>
       {{ book_text|safe }}
     {% endwith %}
diff --git a/src/catalogue/templates/catalogue/snippets/content_warning.html b/src/catalogue/templates/catalogue/snippets/content_warning.html
new file mode 100644
index 000000000..8bee24dcc
--- /dev/null
+++ b/src/catalogue/templates/catalogue/snippets/content_warning.html
@@ -0,0 +1,8 @@
+{% load i18n %}
+{% if warnings %}
+<p class="content-warning" style="background-color: #9e3610; color:white; display:inline-block; padding: 5px 10px; border-radius: 1em;">
+  {% trans "Caution: text contains" %}
+  {% for w in warnings %}{% if forloop.counter > 1 %},{% endif %}
+    {{ w }}{% endfor %}.
+</p>
+{% endif %}
diff --git a/src/catalogue/templatetags/catalogue_tags.py b/src/catalogue/templatetags/catalogue_tags.py
index d9b0faadc..25976dbc6 100644
--- a/src/catalogue/templatetags/catalogue_tags.py
+++ b/src/catalogue/templatetags/catalogue_tags.py
@@ -496,3 +496,18 @@ def status(book, user):
         return 'preview'
     else:
         return 'closed'
+
+
+@register.inclusion_tag('catalogue/snippets/content_warning.html')
+def content_warning(book):
+    warnings_def = {
+        'wulgaryzmy': _('vulgar language'),
+    }
+    warnings = book.get_extra_info_json().get('content_warnings')
+    warnings = sorted(
+        warnings_def.get(w, w)
+        for w in warnings
+    )
+    return {
+        "warnings": warnings
+    }