Speech and language are often confused, but there is a distinction between the two:
Speech is the verbal expression of language and includes articulation, which is the way sounds and words are formed.
Language is much broader and refers to the entire system of expressing and receiving information in a way that's meaningful. It's understanding and being understood through communication — verbal, nonverbal, and written.
Although problems in speech and language differ, they often overlap. A child with a language problem may be able to pronounce words well but be unable to put more than two words together. Another child's speech may be difficult to understand, but he or she may use words and phrases to express ideas. And another child may speak well but have difficulty following directions.