1. Always try to cool him down and never cause him to be angry.
2. Talk to him frankly about the his thoughts on the effect of swear words on your kids.
3. He might need an advice from experts in anger control.
4. His near friends and relatives might be able to advise him on the damaging effect of swear words in the children.
5. Remind him if you feel that he might listen about what the Prophet (SAWA) and Ahlul Bayt (AS) said about anger and swear words and the fact that every word from us is recorded on us.
Wassalam.