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Wikipedia offers this account of how the Dakelh came to be called "Carriers":According to noted anthropologist Antonia Mills, the term "Carrier" was derived from the mortuary tradition of carrying the husband's ashes back to the main traditional village site, where a potlatch would be held acknowledging the passing of the individual and dealing with redistributing his property.
If there was a Salishan language in as good shape as Dakelh that would be the obvious choice.