Transtsaia
Transtsaia is a geographic and cultural region of Shingtsun made up of the lands on the left bank of the Tsai river administered by Kyaw Cen and Imerchal. Transtsaia shares its only land border with Sofao Tâsi to the east.
The northern half of Transtsaia is administered by Shingtsun, one of the three republics of the Kingdom of Kyaw Cen. The language most commonly spoken as a native language is Sasaian. The majority of that area is located in the Sasaian Nation.
The southern half of Transtsaia is administered by Vansterèl, a condominium co-administered by Imerchal, Shingtsun and the Kyawcenni federal government. The whole Vansterèl-administered area of Transtsaia is a part of the municipality of Pòrt d'Avets. The majority of its population is Occitan-speaking.