# `Cldr.UnknownLocaleError`
[🔗](https://github.com/elixir-cldr/cldr/blob/v2.47.3/lib/cldr/exception.ex#L1)

Exception raised when an attempt is made to use a locale not configured
in `Cldr`.  `Cldr.known_locale_names/1` returns the locale names known to `Cldr`.

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*Consult [api-reference.md](api-reference.md) for complete listing*