Columbia subject headings:
English language--Dialects.
English language--Grammar, Comparative.
English language--Grammar, Historical.
English language--Study and teaching--Foreign speakers.
English language--Variation.
Harvard subject headings:
English language--Dialects
English language--Grammar, Comparative
English language--Grammar, Historical
English language--Study and teaching--Foreign speakers
English language--Variation
Princeton subject headings:
English language--Dialects.
English language--Grammar, Comparative.
English language--Grammar, Historical.
English language--Study and teaching--Foreign speakers.
English language--Variation.