Help to add char to font game Emperor ries of the middle kingdoms

[nguoikhongphoi]

Hi everybody

I like this game, and wanna translate this game to my language (VietNamese). I found three file which need edit
EmperorMM.eng
EmperorText.eng
and font
China_Fonts.sg3

I extracted EmperorMM.eng EmperorText.eng by engconverter-0.4 and font China_Fonts.sg3 by sgreader. However, i can't change font charater or add some new char. It's seem the game limited. I wanna add some new char to font game i the picture below
https://upanh.org/image/2.fZTAao

I have folder font https://www.mediafire.com/file/1he0k642tf6qvgd/China_Fonts.rar/file

Can anyone help me, make the font for this game. i'm so excited and grateful
Thanks for read it.

[nguoikhongphoi]

Can anybody help me?