* Vernacular: This is a formal term for the language or dialect spoken by ordinary people in a particular country or region. It often contrasts with formal or literary language.
* Colloquial: This refers to informal language used in everyday conversation. Colloquialisms are often regional or slang expressions.
* Informal language: This is a broad term that encompasses any language that is not formal or academic. It includes everyday speech, slang, and idioms.
* Spoken language: This simply refers to language that is spoken rather than written.
The most appropriate term depends on the specific context. For example, if you are discussing the language of a particular region, "vernacular" might be the best choice. If you are talking about informal expressions, "colloquial" or "informal language" would be more suitable.