Some of my most embarrassing moments occurred in my childhood, when I stuttered. One evening, I offered my younger sister’s friend a drink, and, instead of answering me, the friend said to my sister, “Why does your sister say ‘dr-dr-drink’?” I remember crying myself to sleep that night.
Thank G-d, I outgrew it by age 11.
All the stutterers I know only stutter in their primary spoken language.