Internal error
Fragment of a discussion from Support/LiquidThreads
Thank you. So you mean Special:AdvancedTranslate is not being used anymore? Regards.
No, I think Nike meant that Special:AdvancedTranslate (or perhaps MediaWiki itself) assumes that one of the translated names must be the canonical/default one for that language, so if the configuration is different and doesn't respect this (as it seems to be if I understand correctly the excerpt provided by Nike) nothing works.
If you tell Nike which one of 'VerificarUsuario', 'CombrobarUsuario', 'Comprobar_usuario'
is the preferred translation he'll fix it.
Nemo