+ meta_tags = list(book.tags.filter(
+ category__in=('author', 'epoch', 'genre', 'kind')))
+ book_tag = book.book_tag()
+
+ lang = book.language
+ lang = LANGUAGES_3TO2.get(lang, lang)
+ if lang not in [ln[0] for ln in settings.LANGUAGES]:
+ lang = None
+