Columbia subject headings:
English language--United States.
Language policy--United States.
Languages in contact--United States.
Sociolinguistics--United States.
United States--Languages.
Harvard subject headings:
English language--United States
Language policy--United States.
Languages in contact--United States.
Sociolinguistics--United States.
United States--Languages.
Princeton subject headings:
English language--United States.
Language policy--United States.
Languages in contact--United States.
Sociolinguistics--United States.
United States--Languages.