linguism

Discrimination based on a person's language.

Competition among or unequal treatment of languages and their speaker communities.

1971 David D. Anderson, "Ahmed Ali and Twilight in Delhi: The genesis of a Pakistani novel," MAHFIL: A.Quarterly of South Asian Literature, Spring-Summer 1971. This time, however, the controversy […] dealt with linguism, the problem of, the multiplicity of competing languages in the subcontinent as well as the cultural and political, overtones of the continuing competition among them.

Conversance with, or predilection for, (foreign) languages

Advocacy of languages on a regional basis