Language

Hello,
I’m using the French language on my website, but the forms, system messages and errors are not get translated by French language.
How can I fix this? is there any way to let this plugin use wp core translation?

and another problem is “forget password” form, on that page reCapcha will now visible and if u enter the email and try to reset the password system will show reCapcha error.

The page I need help with: [log in to see the link]