Monolingualadjective
Knowing or using a single language; written or spoken in a single language.
Monolingualnoun
a person who knows or uses only a single language; a monoglot
Monolingual
Using or knowing only one language; as, monolingual speakers; a monolingual dictionary. Opposite of multilingual.
Monolingualadjective
using or knowing only one language;
Unilingualadjective
knowing or using a single language
Unilingualnoun
a person who understands only one language