Columbia subject headings:
English language--History--Congresses.
English language--Middle English, 1100-1500--Congresses.
English language--Middle English, 1100-1500--Foreign elements--Congresses.
Historical linguistics--Congresses.
Multilingualism--History--Congresses.
Harvard subject headings:
English language--History--Congresses.
English language--Middle English, 1100-1500--Congresses.
English language--Middle English, 1100-1500--Foreign elements--Congresses.
Historical linguistics--Congresses.
Multilingualism--History--Congresses.
Princeton subject headings:
English language--History--Congresses.
English language--Middle English, 1100-1500--Congresses.
English language--Middle English, 1100-1500--Foreign elements--Congresses.
Historical linguistics--Congresses.
Multilingualism--History--Congresses.