Change language of the portal navigation panel

I am configuring portal content, my portal has abap ume , a customized desktop, portal roles and iviews, as usual, portal users have espanish language, and sap backend users too; Nevetheless in the navigation panel appear the texts "Deatailed Navigation" and "Portal Favorites", instead of "Navegación detallada" and "Favoritos de Portal" what could it be? ... twentyy points for your help!!!

Regards,