[Chiuso] Menu appears mixed between Spanish and English

We have outsourced the translation to an external company, and they have done so by exporting and importing the translation with XLIFF files, but when importing it to the website, it does not link properly. The menu appears mixed between Spanish (original language) and English, and we need to fix this as soon as possible.

I think there is something messed up in this wordpress site, we laready had installed WPML but we outsourced the transaltion of the new design and once they imported it its like we still have the old english version and the new one. Spanish is the original language of the website and we have problems with the menu, it shows some menu title in spanish and other in english.