how can i write comment in matlab containing punctuation?

i want to write a comment with punctuation like this:

Ex: %Xin chào!

after i save and open

Its become : %Xin ch?o!

Plz. Anyone can show me how to comment with punctuation in matlab?

Thanks a lot

LXT

[Rik]

Apparently your files are not saved as UTF8. If I recall correctly, this is a setting you can change.

[Le Xuan Thang]

Yes. Thank you sir. The Matlab 2022a solve this problem for me. Thank you!!!