Speech must be produced from our subconscious mind and it has to be involuntary but the moment we are conscious about our speech that’s when we start planning words and hence stutter. Stuttering is not the problem but it is the manifestation of a problem. It can be stopped if one is able to divert the focus to something else other than focussing on words while speaking. I stopped stuttering in 2016 and have been fluent since then :) all I did was modulation. Please feel free to ping me if you have any queries!! Always ready to help