My daughter 2 1/2 year old has profound speech delay she has no hearing problem.other activities r normal.help

she used to speak single words a year back then we relocated which upset her at the moment she became mute for about 6 months after that we returned to the previous location and gradually she started to speak again but now she mostly babbles and speaks 3 or 4 words.there is a family history of delayed speech in her fathers family.she is a very willful child and makes everyone understand exactly what she wants even strangers by gestures alone