Columbia subject headings:
French language--Standardization--Congresses.
French language--Study and teaching--Congresses.
French language--Variation--Congresses.
Harvard subject headings:
French language--Standardization--Congresses.
French language--Study and teaching--Congresses.
French language--Variation--Congresses.
Princeton subject headings:
French language--Standardization--Congresses.
French language--Study and teaching--Congresses.
French language--Variation--Congresses.