Speaking with a slight accent in front of the whole class takes courage. Your voice belongs in that room.

Speaking up when your voice sounds different from the room means carrying a worry about how you sound on top of the ordinary worry about being wrong. That is a double cost nobody else in the room is paying. It is worth paying anyway, because a room where only certain voices speak ends up a worse room for everyone in it. How you sound is not a deduction from what you said.

Take one speaking turn this week on purpose, with something you actually want to say. Go slightly slower than feels natural, which helps the room and lets you hear yourself.