Thai font in iOS

I'm developing an iOS app that has many Thai text. If I understand correctly the system font for Thai font is Thonburi? It is so ugly and I hates it. Do i have any other choice? and when will apple replace Thonburi with another nice Thai font? What is my solution? I saw some article says that implementing custom font into lots of texts in iOS is a nightmare. I'm a solo developer, I need solution for my project, not the ugly Thonburi font. How can apple live with it for 10 years in iOS? omg