Yes, strong language. But, you are warned at the start. I've watched every episode, was amused and actually found the father daughter interaction very sweet. Danny is actually a very sensitive soul and shows insight into his background and behaviour.
Read a travel guide if you want details about Italy. However, if you want a light hearted chuckle and flavour of Italy, you may be surprised. Warning, there is swearing, frequently. Don't watch if you're offended. I f*****g enjoyed it.