There are many pages being created on ptwiki with categories in the format [[Categoria:Category:Foo]], which is incorrect. The tool should either use the localized namespace (preferable), or the English namespace, but not both.
https://pt.wikipedia.org/w/index.php?search=insource%3A%2FCategoria%3ACategory%2F&title=Especial%3APesquisar&profile=advanced&fulltext=1&advancedSearch-current=%7B%7D&ns0=1
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