(There's no video for Thai Language Toolkit (TLT) yet. Please contribute to MR and add a video now!)
Thai Language Toolkit (TLT) is the utility that allows you to type, display and print Thai characters in various applications.
Thai-Language-Toolkit--TLT--3.5--mac-ppc-.sit (3.03 MiB / 3.17 MB)
For Mac OS 8.5+ / compressed w/ Stuffit
Thai-Language-Toolkit--TLT--4.1--mac-ppc-.sit (3 MiB / 3.15 MB)
For Mac OS 9.0.x only / compressed w/ Stuffit
TLT 4.1 only compatible with Mac OS 9.0.x, 9.1+ not supported.
Emulating this? It should run fine under: SheepShaver