Why are locales not required in Musl?

[Alfanjui]

While reading the handbook it came to my attention the little note saying that Locales aren't required on Musl systems.
What's the explanation behind this? what does it use instead?

Thanks in advance!
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Alfanjuí

[GDH-gentoo]

Probably because, as their own community wiki admits, "Locale support is very limited, and barely works" (source).

[Alfanjui]