Link targets

Thanks for asking. The rule is at Localisation guidelines: "translate, don't customise". In this case adding Special:MyLanguage is part of translating that message correctly: its qqq was recently updated after software upgrades on wikimediafoundation.org.

You can finish the work manually for your language, following the docs; as for me, my next step will be an attempt to add the language code suffix in most cases, then I'll fuzzy the messages to ask an update.