Columbia subject headings:
Harvard subject headings:
Bilingualism--England--History--To 1500--Congresses.
Bilingualism--Ireland--History--To 1500--Congresses.
Code switching (Linguistics)--England--History--To 1500--Congresses.
Code switching (Linguistics)--Ireland--History--To 1500--Congresses.
England--Civilization--Congresses.
Ireland--Civilization--Congresses.
Preaching--History--Middle Ages, 600-1500--Congresses.
Princeton subject headings:
Code switching (Linguistics)--England--History--To 1500--Congresses.
Code switching (Linguistics)--Ireland--History--To 1500--Congresses.