[Solved] Translation problem

Hi everyone,

Maybe dumb, but I am facing a problem with my multilingual site. 2 langs for now so I set the .po files for phrases

when I translate my form using WPML, the phrases for sorting etc, translate smoothly themselves

but the problem I have is the header title and the "post a comment" button, which either stays in English and if I translate them to french, they appear in french on the english version as well.

Can someone tell me, which settings I got wrong ??? thank's a bunch