There is little chance of Gaelic or Welsh dying out. Welsh is still widely spoken and Gaelic is being spoken in Ireland by more people than ever before. I do not think that governments in America, Canada or other places should use taxpayer's money to support foreign languages, however the Welsh, Scottish and Irish Governments certainly should.If a person who speaks two languages, then you have 2 people, and that is a positive situation rather that a negative.
Language is a part of ones culture and should be preserved, but not at a cost to people who are not part of that particular culture.
Lyndi-Loo - I suspect your husband is having an argument just for the sake of winding you up as you said.
Slainte