I study near the french-border and, in my experience, relying on english in france is hard and even the universities are often not really easy to navigate without speaking french.
I can't learn the language immediatly and so I think starting at the startup will be hard or impossible for me if everything they'r doing is in french. That's what I mean with "I don't feel welcome".
Essentially, you're implying the French are chauvinists that don't care about "non-frenchmen", because they write in French. You are also implicitly accusing these specific French people of being chauvinists because they wrote the jobs section in their native language.
This is completely unwarranted. As they've commented they didn't just have the time to translate the section.
Furthermore, I would add, that seemed obvious from the start to me and it's the charitable, or generous, interpretation anyway.
Therefore, you strike me as someone who looks for reasons to be aggravated. So I wouldn't hire you.
I just want to stress that didn't want to accuse anyone of anything. I just stated the impression the job-section gave to me and think it could help them assuming my experience is not unique.
seems like we have a mutual understanding of not wanting to hire each other