This is my new S4. I just came back from another rom. Previous version worked well in my old S3.
My S4 recovery is for Kitkat, it might be the reason for this problem?
After spending the whole day to reflash i9500 with official rom/recovery back to 4.2.2 and tried to reflash MIUI 4.4.4 as well as font installer. There still not be Thai language available, both for writing and reading