How can I solve this problem please?
ps: After solving the translation problem, I want to take the Addon Custom for the member area but I would like to know what else it brings apart from adding fields to the form?
About the missing phrases, Navigate to Dashboard > wpForo > Overview, and Press "Rebuild Phrases" Button
About the User Custom Fields addon please ask your question at https://gvectors.com/forum/
We don't provide support for the Addons here, only for wpForo Plugin, the addons have their own forums at gvectors.com