Italian translation not displaying on book page

[MichSpieler]

Description

A network manager who has contributed extensively to the Italian localization on Transifex has reported that translations are not showing up as expected. For example, when a book's language is set to Italian, the strings on the book's webpage still appear in English:

"All Rights Reserved" and "Read Book" should appear in Italian.

The translation is present in McLuhan / pressbooks-book on Transifex:

It is also present in pressbooks-book/languages/it_IT.po:

100% of McLuhan is translated to Italian. 46% of Pressbooks is translated to Italian.

I have compared this to what happens when setting the book language to Spanish (works as expected) and to German (does not display translation) as well.

I found the "Leer el libro" string in three .po files:

For German I found "Buch lesen" only in 2 files:

For Italian I found "Leggi il libro" only in 1 file:

[cmurtagh]

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[frankjmueller]

Thank you for adding this. German works for me. Weird.