Its showing some weird text in bottom corner of participants list (LN_MEET_ASK_UNMUTE_ALL) and in more button.
I have not updated any language translation. Its default set english.
Primarily all text on the preview screen starts with “LN_MEETING_*”.
The first button text in the dialog that should say “Join with audio” is replaced with one of these placeholder strings. Oddly the other two buttons are correct. “Call in to meeting” and “Join without audio”