Using different languages

Could I make participants in my study type their first language (e.g., Korean) to respond to stimuli?
For example, an English word is presented on the screen, and a participant is asked to type the first language meaning of the English word given on the screen. Although I tried to have coding (e.g., putting each Korean characters, “ㄱ”,“ㄴ”,…), it did not work.

OS (e.g. Win10):

The TextBox component uses GLFont to generate character glyphs, so the characters which work in Textbox are the same as those supported by GLFont:

When you tried inputting Korean characters, what went wrong? Did it display as a on screen or did it substitute them for English characters?