Columbia subject headings:
Harvard subject headings:
Cultural pluralism--Luxembourg--Congresses.
Education, Bilingual--Europe--Congresses.
Language and languages--Study and teaching--Europe--Congresses
Languages in contact--Europe--Congresses.
Multilingualism--Europe--Congresses.
Multilingualism--Luxembourg--Congresses.
Princeton subject headings:
Cultural pluralism--Luxembourg--Congresses.
Education, Bilingual--Europe--Congresses.
Language and languages--Study and teaching--Europe--Congresses.
Languages in contact--Europe--Congresses.
Multilingualism--Europe--Congresses.
Multilingualism--Luxembourg--Congresses.