Languages have lives; they grow, prosper, some become classics, or universal to a greater or lesser degree, they grow old and die. Latin for example. It's the same as people for me; I'm sad when they die, happy they lived a good life, and benefited people. I am sad that some languages are killed. Navajo and Gaelic (I'm Irish) are examples. Should a dieing language be preserved? Yes, but to what extent and by whom and for what purpose?

Languages enrich each other. So the loss of any one language impacts on other languages. Professor B, I'm really mystified by your comment: Gaelic is dead? Perhaps you read that somewhere, but from my time in Ireland (most recently 8 months ago) living with Irish families, Gaelic is very much alive, often used, and being taught as a home language to children. The 'bearla' speakers didn't succeed in killing it off. ;)

Hi... yes if it is possible should be preserved...

Yes.... Languages aid in telling about a culture... Plus, it can be linguistically and historically helpful.... <Rosetta stone, etc.>