There are a number of speech disorders including apraxia speech therapy, articulation, phonological disorders and tongue thurst. You can learn more about this disorders below.
Types of Speech Disorders
Apraxia of Speech - a speech disturbance resulting from a coordination difficulty. Apraxia speech therapy is necessary for those who experience apraxia.
Articulation - way sounds are made to produce intelligible speech
Phonological Disorders - child does not develop the ability to produce some or all sounds necessary for speech that are normally used at his or her age. Often times a child with a phonological disturbance has not extinguished simplification patterns. For example: it is typical for a young child to say "lellow" but as the child becomes older the simplification pattern should go away, and the child should be able to say "yellow".
Tongue Thrust/Reverse Swallow: a disorder pattern of speech which results from lingual protrusion never extinguishing during speaking, swallowing or at rest.