I understand you don't like it. However you can say "I would rather you didn't swear with me please"
If that is the worst fault he has consider yourself lucky. Many men (and indeed women) make horendous life partners. Example: for me, the ex was violent and abusive. Women are still dieing every week at the hands of violence and the aftermath of abuse etc. and more.
It sounds to me if you don't think he is good enough for your daughter! I suggest you open your mind and change your thinking around him if you don't want to alienate your daughter.
It's her life and her choices. Our children are through us, not of us so it is best if you look for the good in him.
There is a little bit of good in the worst of us and a little bit of bad in the best of us it I'll behoves any of us to talk about the rest of us" as my late mom used to say. Jeus I sound more like her every day!
Have any of you got all electric cars? Pros and cons please.