Why wait?
Some parents know their children need help with their speech and language. Others are told “Einstein did not talk until he was 4 years old”. The sooner you catch it the easier it is for your child to be a successful communicator, however that looks.
If you have been living with a child having tantrums because of frustration at not being understood, please call. The proper intervention leads to a more confident and happy child in a more harmonious home.