The Goguryeo language was spoken in the ancient kingdom of Goguryeo (37 BCE – 668 CE), one of the Three Kingdoms of Korea. The language is also known as Old Koguryo, Koguryoic, and Koguryoan.It is unknown except for a small number of words, which mostly suggest that it was similar but not identical to the language of Silla, and may have been influenced by the Tungusic languages.