It's likely you'll start stuttering once you get acquainted and familiar with the new language. Stutter varies across activites - this I'm sure we've all experienced - and performing a new language might be akin to taking on a role of some sort, which can be enough to dodge the stutter. But there's some sort of difference on the personality level that plays into the various social actions we perform. Stutter is influenced by this. We simply don't know enough about stutter yet to say anything definite... but I guess it'll be interesting to see if you can keep dodging your stutter. :)