NS_CATEGORY => 'Categoria', NS_CATEGORY_TALK => 'Categoria_caraba',
NS_CATEGORY => 'Categoría', NS_CATEGORY_TALK => 'Categoría_caraba',
I've renamed them at https://gerrit.wikimedia.org/r/#/c/336986 but doing so will break, if I understand it rightly, all Categoria: pages. So I've submitted https://gerrit.wikimedia.org/r/#/c/337192/ adding the wrongly named ones as temporary namespace aliases so nothing breaks in the meanwhile. A bot can be tasked with renaming those pages later.
Did not added those at MediaWiki core because I don't think we should encourage using wrongly named/translated words. Also, 'ext' is a barely used language and the potential damange is close to 0.
If somebody has a better idea about how to handle this please do comment. Thanks!