There's one language I stutter TERRIBLY on despite having studied it for years - I think it might just be because I learned it in high school and we used methods (tape recorders, in-class time-sensitive rapid questions as our weekly oral quiz, impatient classmates who conflated blocking with not knowing the answer) that were stutterer kryptonite. Other than that, I speak 3 other languages on a daily basis - English the most at the moment. I notice that I stutter least in the language that I'm using most atm, probably because it comes easiest. The more I'm thinking about words and phrasing, the less flexibility I have and the higher my speaking anxiety is, so I stutter more. Honestly, it's not too bad anymore. People comment, and it frustrates me when people say I'm not very good at B and C languages because I stutter (more) in them, but those people are kinda right. If I spoke B and C more, I'd stutter less, so yes, they're not as good as my English. It's hard not to take it personally, but even that's getting easier.