An update: I'm able to make sounds again. Not really talking, no one can understand what I'm saying, but I can squeak and grunt and make sounds hehe. My mounth (tongue I guess?) is better, but my diaphragm is weaker, so yeah: I use respiratory support now.

I still haven't made up my mind about treatment, but for now I just try this, see how it works out: maybe things will get a bit better just over time, because that sometimes happens with mg.