This is a proposal to encode the Lanna script in the international character encoding standard Unicode. The name of the script was changed to "Tai Tham" by consensus of users in different countries. Tai Tham was published in Unicode Standard version 5.2 in October 2009. Tai Tham is used to write Northern Thai, Lue, and Khün, which are spoken in Northern Thailand, Myanmar, China and surrounding areas. It is also used for Lao Tham (Old Lao). The script is known by various names: Old Xishuangbanna Dai or Old Tai Lue in China, Khün in Myanmar, and Tua Mueang, Lanna, or Yuan in Thailand. Several changes have been made to the script since the proposal was written, so users should check the latest code charts, accessible from , and section 16.7 in the Unicode Standard.