LITTLETON, Colo. -- Mike Gray can speak English fluently, and in the lawn-care business, he says, that's a marketable asset. So he advertises his linguistic ability with a sign on his trailer depicting an American flag with the message, "Lawn Services Done With Pride! By An English Speaking American." Now that sign could end up getting Mr. Gray fired. His supervisor at the Arapahoe County Road and Bridge Department has threatened to terminate Mr. Gray, a heavy-equipment operator for 16 years, unless he covers up the red, white and blue message.