Thai is the national and official language of Thailand.
Mandarin
The standard national language of China, commonly used in Taiwan to refer to Mandarin Chinese and historically used to distinguish it from regional dialects
language arts
A primary school subject focused on the national language and literature
Guoyu
An ancient Chinese historical text from the Spring and Autumn period, also known as the 春秋外传chūnqiūwàizhuàn