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.
English is a de facto global language.
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.
It is important to preserve the diversity of the world's languages.
Compound of 世界 (sekai, 'world') and 言語 (gengo, 'language').