Some of the older Casio Chinese-English dictionaries have the ability to change the Menus to either Japanese, English, or Chinese (maybe E-A99, E-G200, etc?). The older Casio Japanese-English dictionaries don't typically have this feature although newer ones might. This is instructions to change the menus to English:
https://support.casio.com/storage/cn/manual/pdf/CN/003/Quick_Guide_E-XA_EN_CN.pdf
There is a different Casio electronic dictionary (E-A10) that has English menus. I think these were only sold to schools but maybe there is something used available in Vietnam.
https://web.casio-intl.com/jlt/en/use/basic05.html