Hi, and thank you for your interest!
yast-timezone_db is being translated using Weblate, a web tool designed to ease translating for both developers and translators.
Translation project for yast-timezone_db into Thai currently contains 475 strings for translation and is 42.9% complete.
If you would like to contribute to translation of yast-timezone_db, you need to register on this server.
Once you have activated your account just proceed to the translation section.