American English vs American language

American English and American language both are nouns.

Word	Noun	Adjective	Verb	Adverb
American English	Yes	No	No	No
American language	Yes	No	No	No

As nouns, American English and American language are synonyms defined as:

American English and American language: the English language as used in the United States

Other synonyms of American English include American.

American English (noun)	American language (noun)
the English language as used in the United States	the English language as used in the United States