hello felipergueza
i tried the same with my 1.4.0rc6 (normally used in german). some entries in the menu 'insertar' are in english and some standard entries from the operating system remain in german – the whole rest is in spanish…
did you change the language in: 'file' → 'preferences' → 'general' → 'language' or only in: 'file' → 'preferences' → 'hyphenator' → 'language'?
…you need both, as i think…
utnik