If somebody stutters in their native language, and they learn to speak another language, will they necessarily stutter in the other language too? Or will switching languages turn off the stuttering? (I am guessing that using another language will not stop one from stuttering, but just wanted to make sure.)
I don’t h
Stutter is not a linguistic problem, it is a speech defect. I think switching languages will not turn off the stuttering 
I have a (very minor) stutter when I speak English (native language). I also speak some German (reasonably well, but not fluently). I was going to say that I don’t stutter as much in German - but then I realised that I lived in Germany (and thus learned German) after I had learned to get around my stutter much better in English. Probably also the fact that when I speak German, I tend to speak slower and more deliberately (because I have to think about what I’m saying and translate in my head) also helps to minimise the stutter.
I forgot to add: In conclusion - I stutter in both German and English. Not much in either language any more, and maybe a little more in English than German (but it might just be my twisted perception).
I also sometimes stutter a little. I’m pretty sure, from research I’ve done, that the stutter would follow me into another language. I read about an interesting, but limited, study that showed that stuttering could follow into typing. When confronted by the same things that caused stuttering in speech, people would pause and hesitate in their typing. At the same places they would stutter.
I think that the cause of stuttering has been shown to always be “in your head”.
Peace,
mangeorge
I read in Stephen Pinker’s book The Language Instinct that stutterers and people with other speech impediments can sing smoothly. That the impediment doesn’t affect them when singing. Pinker gave a good overview of the neurolinguistic circuits of the brain, and the explanation that the brain module used in speaking (Broca’s area) is different from the part of the brain used in musical performance.
But speaking another language still uses Broca’s area, so one wouldn’t expect the second language to be free of stuttering.
According to this survey, no statistical difference could be found in the level of stuttering between monolingual and bilingual speakers.