The date in Thai language does not appear, even though previously appearing normally.

[Schemgroup]

Before, I was able to use the Thai language settings normally, The date and month were Thai. It will show when I finish signed. But now when I set the Thai language The month is (. .) instead of Thai, so I don't know which month the person signed. But if I change the language of the webpage to English US, The month will be normal. I don't know what caused I tried to change my browser and I couldn't or try changed the device and not the same.