Why Don’t I Stutter When I Speak In My 3rd Language?

Why Don’t I Stutter When I Speak In My 3rd Language? I know my native language, my second language is english, and because I live in canada, I learn french at school as my 3rd language. I recently had a french presentation where I spoke for about 5 minutes straight, and I only stuttered twice even though I stutter a lot in english and my native language. Why is this?