Change book language
Setting the user language is done by each individual user. The chosen user language is applied system wide to all this individuals' books. Two different users might work on a shared book each having a different user language.
Open your book.
Go to the Transactions page.
Click the Configuration Menu (⚙️) on the right side of the page.
Choose your language preference.
Open your book (change the user language on the book configuration, this change will apply to all Bkper books).