I go into Google and put 'translate English to Italian'. Hope this helps.
If you are writing concerning the Family Search website at the top of the landing page click on the arrow next to the world globe and click on Italian or any other language you want.
If you are indexing, you need to click on Batch in the top left corner, Click on Settings, Click on Language. Toggle both the Field Name and Field Help and Project Instructions to Project Langugage.