Auxlang is a short word for "auxiliary language", i.e., a language that is designed and promoted as a bridge language between people of different languages.

There are [International Auxiliary Languages (IALs)](https://en.wikipedia.org/wiki/International_auxiliary_language) aiming at the whole world as a target, and [Zonal Auxiliary Languages](https://en.wikipedia.org/wiki/Zonal_auxiliary_language) aiming at a group of linguistically or culturally related people.

Examples for international auxiliary languages are Volapük, Esperanto, or Interlingua; examples for zonal languages are Interslavic or Afrihili.