Is it normal for people to make fun of how you talked in high school?

Was it friends just messing with you or was it bullies?

Yes, especially if you are autistic.
It was the same among my group of friends, though we all made fun of each other in a harmless way. I rarely heard it from non-friends. In a way I'm thankful because it made me aware of some of my weird mannerisms so that I was able to fix them.

When I was in middle school and high school, it was normal for kids to make fun of you for everything. I’m sorry those kids were dicks to you. It sucks, but just be grateful you are not that kind of person.

Nah, schoolchildren make fun of everything. They make fun accents, hair styles, even parents' names, etc. They're children. If adults make fun on you then they might have problems.

Kids will make fun of anything that sounds or looks different to what they are used to. Of course if the person isn't part of a cool crowd anything they do will be up for mockery. If the kid is part of a cool crowd they can be as weird as fuck and it will just be accepted and even mimicked in tribute.

TL;DR Kids are sheep who are desperate to fit in and will make fun of others or copy someone in the hopes they are not made fun of themselves.

In college, they made fun of the way I talked a lot. But, I did not grow up speaking English, so I said a lot of things wrong.

A sharp, hard punch to the bridge of the nose does wonders when you are being bullied. They never expect it.

i had an accent in high school.