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In page Luxembourgish:

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Luxembourgish was considered a German dialect like many others until about World War II but then the language underwent ausbau, creating its own standard form in vocabulary, grammar, and spelling and therefore is seen today as an independent language. Luxembourgish managed to gain linguistic autonomy against a vigorous One Standard German Axiom by being framed as an independent language with a name rather than as a national pluricentric standard variety of German.[citation needed]