noun
global language; world language
Refers to a language used widely across the world, such as English, or to the concept of a single language for global communication.
英語は事実上の世界言語だ。
English is a de facto global language.
noun
languages of the world; world languages
Refers to the collection of all languages spoken around the world, often in contexts like linguistics or cultural studies.
世界言語の多様性を守ることは重要だ。
It is important to preserve the diversity of the world's languages.
Compound of 世界 (sekai, 'world') and 言語 (gengo, 'language').