It is not clear exactly what type of speech disorder your daughter is suffering from and how severe the disorder is. In any case, it is not possible to determine the cause of a speech disorder over such a medium. While many problems have home remedies and general recommendations that are effective, a speech disorder must be investigated personally by a doctor or therapist, and only then can the causes be determined and treatment be prescribed.
You should first of all visit your family doctor and ask for advice. With his help and the help of a specialist, you will first need to find out whether there is some physical problem due to which your daughter's speech is unclear. If the problem is physical, you may consider surgery to rectify it, depending upon the seriousness of the problem and the benefits and risks of surgical intervention. If there is no noticeable physical problem, the disorder may be due to some brain damage or neurological condition. Other possibilities that need to be investigated include a hearing impediment, some sort of mental retardation, or even some psychological trauma that your daughter has been through. Depending on the cause and the severity of the disorder, your daughter can then begin treatment, which will include speech therapy.
answered by G M