Columbia subject headings:
English language--United States--Dialectology.
Language and languages--Variation.
Portuguese language--Brazil--Dialectology.
Harvard subject headings:
English language--United States--Dialectology.
Language and languages--Variation
Portuguese language--Brazil--Dialectology.
Princeton subject headings:
English language--United States--Dialectology.
Language and languages--Variation.
Portuguese language--Brazil--Dialectology.