After some talk on IRC with Reedy and Mark, I'm bringing this to the list.

I'm interested in getting $wgCategoryCollation set to 'uca-default' on Portuguese wikis, and after searching on Bugzilla I found this: https://bugzilla.wikimedia.org/show_bug.cgi?id=30996#c5 (Set $wgCategoryCollation to 'uca-default' and rebuild category sort keys on Wikimedia wikis deployment) where Tim comments: ---- The first letter identification code (maintenance/language/generateCollationData.php) won't work for all languages, so some wikis will have their category pages broken terribly by this change. Also, the default collation tables sort a lot of languages incorrectly, and the amount of breakage that causes will depend on the language in question. So I recommend doing this change on a language-by-language basis, after checking each language for correct collation and first-letter behaviour on a test wiki. (...) ----- So, how could we check whether "Portuguese" wikis would break by doing this change? Could we schedule the necessary tests, in order to fix the category ordering on WMF wikis?

Currently, we still need to use {{DEFAULTSORT: Page Name without accents }} on any article whose title has an accent if we want it to be sorted appropriately in the categories. E.g.: https://fr.wikipedia.org/w/index.php?title=%C3%89bedj%C3%A9sus&action=ed... https://pt.wikipedia.org/w/index.php?title=%C3%81gua_Boa&oldid=28441112&... http://es.wikipedia.org/w/index.php?title=%C3%8Dpsilon_Hydrae&action=edi...

Best regards, Helder