What is a catalog of languages called?

There isn't one single, universally accepted term for a catalog of languages. However, depending on the specific focus and content, you could use a few different terms:

* Language List: A simple, comprehensive list of languages.

* Language Inventory: A more structured list that might include information about the number of speakers, geographical distribution, or language family.

* Language Atlas: A visual representation of language distribution, often including maps and charts.

* Language Family Tree: A diagram that shows the genealogical relationships between languages.

* Language Database: A digital collection of language data, often with search and filtering capabilities.

* Linguistic Survey: A comprehensive study of the languages of a particular region or country, often including historical and sociological information.

The best term to use will depend on the specific context.