Monolingualism

Monoglottism (Greek μόνος monos, "alone, solitary", + γλῶττα , "tongue, language") or, more commonly, monolingualism or unilingualism is the condition of being able to speak only a single language, as opposed to multilingualism. In a different context, "unilingualism" may refer to a language policy which enforces an official or national language over others.