I think you should give up on all languages except one - that would probably work (although maybe not what you were hoping for . . . )

Think in French while speaking in French, similarly as you think in Russian while speaking it, it will for sure solve your problem..cheers:))

Hello, there! Your teacher is correct. I would suggest devoting one day to listening to French speakers (newscast, a narrated story, sermon, etc.) then the next day, do the same with the other language. When you get better, you can switch between the two in conversations. Practice can help you overcome it, or at least have it happen less frequently. I have been learning Portuguese for the last year, and whenever I try to speak French now, Portuguese just sort of pushes itself onto the front of my brain and my tongue!!! It even does that to me in Spanish and English sometimes, because I have devoted so much time to it. So I understand what you mean!!!

I had it too :D I mix up some of languages instead. But after I try to focus learning it, I think english always help me to understan other laguages. Compare english with other languages will help us. So, for first time I'm sure everyone have same problem like you.

I used to have the same problem:) Puis ce problème a disparu, mais je ne sais pas comment.