In my opinion: I don't know, but let's say that in 50% of PWS (people who stutter), they stutter more in their native language, while the other 50% of PWS stutter more in another language that they are not familiar with. If this is true. It could imply that "stimulus evaluatoin" and "the way how the subconscious treats this evaluation" prior to stuttering blocks are relevant. (it's a relevant subconscious element that we have at least some control over) So. If you are more confident in (i.e., mastered) the language, some people might speak more fluently. If this is true, it could imply that their subconscious EVALUATES stimuli (such as confidence to express a language) to execute speech, that is, to say a word/sound. Whereas in the other 50% of PWS who stutter LESS in another language (COMPARED to their native language). Perhaps they feel more FREE in their speech execution regulation to make mistakes. For example, they might have a sensation that mistakes are ok in a foreign language, resulting in less pressure, or less NEED to speak perfectly (or whataever). It can literally be ANY REASON that we give to our subconscious, the actual raeson doesn't matter, it can be a fake reason at that. As long as our subconscious relies on said NEED to execute speech. It can result in an increase or decrease in stuttering. Depending on how our subconscious TREATS said stimuli (such as "confidence in/mastering a language") This is my own take on it. Your thoughts?