Children with AS CAN communicate using many methods. Investigate AAC to find the best language system for your child and try to use it from the very beginning. Nothing is more important than being able to communicate effectively with everyone.
You are your child's best advocate, don't ever let someone silence you simply because a need is inconvient for them to meet. Fight for your child's rights, even if it means you're going to go down swinging, just never give up.