A use of many languages.

The knowledge or use of several languages, polyglot character; = polyglottism, n. 1.

Knowledge of all languages.

The knowledge or use of many languages; the fact or condition of being multilingual, polyglot character.

The coexistence of two or more languages in one area or situation. Cf. polyglossia, n.

The state or condition of being multilingual, or the policy of promoting this; the ability to speak many languages; the use of many languages.

fluency in a number of languages.

The ability to speak three languages; the use of three languages.

= multilingualism, n.

The coexistence of two or more languages, or distinct varieties of the same language, within a speech community.