English / french mix ?!

I have a very strange problem in Rhino.
I was working as usual and all of a sudden my keyboard shortcuts stopped working.
The software was telling me “command unknown”. I realized that the software’s commands were in English, even though I use it in French.
So now my software is a mixture of English and French !
It’s very strange. The whole top bar is in English, but the icons on the left are still in French …
I don’t understand a thing! And this changed while I was working.
Can you help me ? None of my shortcuts work anymore…