Spellcheck Italian

Dear SDL Community,

I have some trouble with the spellcheck function for the Italian language. This function seems to work if Italian (Italy) is selected as target language. However, most of the time the target language I worked to is Italian (Switzerland) , as agencies having Swiss clients send me xlf file where the target language is already set. In that case the spellcheck is disabled and cannot be selected.

- Screenshot of disabled function when translatin into Swiss Italian.

How can I abilitate the function for Swiss italian too?

Thank you

Regards

Ilaria