I used to go to speech therapy for about five years because I would mumble far too much. It did help, but I still mumble sometimes. Actually more like 30% of the time, but I'm trying. Why 30%? My grandparents can't understand what I'm saying when I talk to them. Apparently I'm not speaking loud enough. Which is true when it comes to mostly school and in general. I'm either quietly mumbling or yelling about random stuff mostly, which is why nowadays, I'm just refraining from speaking at all. I still talk regularly often though.

It gets kind of weird when I say some words, for example "English" comes out as "Engrish". And it only gets worse whenever I try to deliberately say it. X'D When I read things out loud to my class or just talk in general, some people pointed out that I speak with a slight Japanese accent. Which I just realized would make it, along with my other speech habits, a bad idea to try to teach people how pronounce things properly in English because I can't properly produce some words myself.
I need to stop rambling.

Anyway, I hope you have a great day/night~! ^_^