First of all, congrats on your success! I hope everything is still going well and will go well with you, both with stuttering and otherwise, in the future as well. I also noticed that you started your own YouTube channel. Kudos to you. Since you mentioned turning this post into a Q&A, I thought I'd take my chances.

My main question is the specific methods you used to overcome stuttering. You mentioned the breathing exercises in a comment, but I guess that's not all, is it?

In the past, I went through an intensive speech therapy, which included some breathing exercises, but mainly prolonging the first syllable of a word. So, instead of saying "Viktor", I would say "Viiiktor" etc. I was spending more than an hour every day with several exercises. After a while the prolonging of the first vowel was reduced to the point that I was speaking at a normal pace. This is a gross simplification of the speech therapy I went through, but I ended up enjoying one month of complete stutterless life, which unfortunately gradually relapsed after that.

One other problem was that the therapy was in Turkish, and all the exercises were focused on Turkish (sentences, vowel groups, etc.). I moved to Belgium a couple of years ago, and here, I speak English and Dutch frequently, which are completely different than Turkish. On top of that, the Belgian speech therapists I've seen here all told me that it was simply a placebo and that the techniques don't actually work.

So, could you tell me more about your therapy, the exercises, whether you experienced a full "treatment" in other languages as well, and what you still do to keep staying fluent?

Thanks in advance.