Cldr.Config.fallback
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fallback
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Returns the immediate fallback locale for a locale name. Follows the CLDR TR35 resource bundle lookup algorithm.
This function is only intended to return the fallback for the locales defined by CLDR. It does not perform any alias lookup or likely subtag processing.
Algorithm Summary
Decompose the locale name into language, script, territory and variant. CLDR locale names have no more than these four parts but usually have less.
Look for a locale in the following order:
- language-script-territory
- language-script
- language-territory
- language
At each stage in (2) resolve an alias in
parent_locales/1