OK I have tested it all. My device has Thai Keyboard and Thai Menu and Thai Voice. only thai map not tested yet.
I think it must work on your device to. Just put the files I send before on your device, I think the best thing to do after that is Hard Reset. Turn the device of and keep holding the right bottom and power it on. It will then ask you to do a restore. After the restore it will ask you your country again. I chose Thai there and maybe that is what you need to do.
My device is now both Thai and English.
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