Tsekwon (Tsekwon taishte), also known as Classical Orinco, is the linguistic predecessor to modern Orinco, one of chief languages of Sekowo. Tsekwon was spoken in Carcosa and the surrounding region during the 2nd millennium BCE. Tsekwon is still used as the liturgical language of Orinco Polytheism, and many Orincos, primarily religious leaders, continue to use the language. As part of a wider Orinco nationalist movement in Sekowo, Tsekwon was revived during the 25th century and became an official language of Sekowo with an estimated 2 million native speakers (most younger than 16) and some 6 million secondary speakers, but the Tsekwon revival movement has since declined.