Everything is just labelled as "1."
Topic on Extension talk:UniversalLanguageSelector
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Looks like a bug in Translate when working with Parsoid – compare https://www.mediawiki.org/wiki/Extension:UniversalLanguageSelector?useparsoid=1 (which presumably you're defaulting to?) vs. https://www.mediawiki.org/wiki/Extension:UniversalLanguageSelector?useparsoid=0