Ancient North Martian

Ancient North Martian was a language spoken on Mars, presumably by the Ice Warriors. The Doctor knew the language and spoke in Ancient North Martian, specifcally the sentence: "Hoorghwall in schtochman ahn warrellinsh och fortabellan iin hoorgwahn.", to Margaret Cain when she was possessed by the Flood. As Ed Gold noted, she seemed to recognise it. (DW: The Waters of Mars)