Dear Giorgio,
Often in a scene when a girl is moaning or a bit scared when getting a Dap of deep anal, she is speaking in her native language.
In my case it would add alot of value to the scene if i knew what she said! - Any of you board guys agree?
This is also good in the end of any scene when there is a afterward chat.
You don't have to make the chat more longer by translating some of it on the go (often not all!), and make the chat more natural just by putting down so subs on the screen.
Hope you can make this added value!