Module:Sandbox/Mr. Stradivarius/Check ISO 639-1/doc
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icon This is a documentation subpage for Module:Sandbox/Mr. Stradivarius/Check ISO 639-1.
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It may contain usage information, categories and other content that is not part of the original module page.
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This module checks whether the code passed to the first positional parameter is a valid ISO 639-1 language code.