I think there is a workaround if you wanted an immediate change while waiting for a fix.
Overriding that text using the customise site text option seems to clear it up nicely:
Before:
After:
For that I went to the /admin/customize/site_texts
page and searched for js.user_tips.button
. I then edited it and just retyped ‘J’ai compris !’ and saved.
Though hopefully a proper fix shouldn’t take too long.