# lang/langs Return the languages present in the catalog for an app, sorted, as a vector of strings. ## Syntax

[lang/langs "app"]

## Parameters - `app` — app name (string or keyword) ## Examples

[lang/langs "chat"]    # → @{ "en" "es" "fr" }

## Returns Vector of language-code strings, sorted. Empty vector when the app has no entries or no runtime is attached. `%Err{:message}` when the app argument is missing or not a string/keyword. ## See Also `lang/get`, `lang/load`