Moses brother Aaron spoke for him.
Aaron was the older brother of Moses. Moses stated that he didn't speak well, so God appointed Aaron as Moses' mouthpiece. Aaron helped Moses bring the people out of Egypt. He became the chief priest of Israel, by God's appointment.
Aaron helped Moses.
Aaron.
pray
That he does not speak well.
Oh yes he did speak to many other people beside Moses.. They were the major and minor prophets.
Moses
yes
Through the Burning Bush.
As Moses was stammering god told Moses that Aaron would speak for him, and Aaron was Moses helper to the promised land.
Moses went to Mount Sinai to speak to God, and collect the ten commandments.