My daughter doesnt speak well she is going to be 2...

My daughter does not speak at age two

Well, generally child start to speak after 9 months or at one year with some words but there is percentage which start to speak after two to three years thus there is no problems. If you notice that your daughter grow normally and has developmental milestones there is no problem and just you have to wait.

Investigations to do

There is no investigations. you can just seek doctor to exclude tongue tie