Note that regardless of language tag, IIRC the article you read defaults to an unconverted version, which results in a mish-mash of simple and traditional chara

Note that regardless of language tag, IIRC the article you read defaults to an unconverted version, which results in a mish-mash of simple and traditional characters (many simple characters and traditional characters have different codepoints and are not transformed by han unification language tags).