Before revision: Languages that are only attested by some few words, often names, and a few phrases (called Trümmersprachen in German linguistics, literally "rubble languages") can only reconstructes in a very limited way and often their genetic relationship to other languages remains unclear.
After revision: Languages that are only attested by a few words, often names, and a few phrases (called Trümmersprachen in German linguistics, literally "rubble languages") can only be reconstructed in a very limited way and often their genetic relationship to other languages remains unclear.