Currently our IRC RC feeds output localized log names and the like, making the development of new monitoring tools a /huge/ pain. If one wishes to monitor the feed for one language, fine... but if you want to monitor many then you need to know the localizations for each language and treat them as the same thing within your code. This is needlessly onerous and could easily be fixed by outputting a canonical form. Instead of "Spezial:Log/review" use "Special:Log/review"; instead of "Spécial:Log/upload" use "Special:Log/upload" etc.
As well, user group names are outputted localized.
Finally, and most importantly: even on the same wiki, messages for an action can change by localization:
[[Special:Log/globalauth]] setstatus [...] Set Bloqueado; Unset (ninguno):
That should never appear - Meta is set to English localization, so should output that! I think this is because the user in question uses Spanish interface.