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fxfan

terminals unfortunately are a complete no-go for "all" Asian languages.

to my knowledge right now no terminal emulator properly handles

* cjk- specially so called double width chars

* Indic- dependant vowels

* west asia- rtl

that's the entire breadth of Asia for you who cannot use terminals if hey want to write a letter in their own language.

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With urxvt and hassle to install the correct font, it is doable to edit cjk using vim. Though it is less usable than using English, since you have to go back and forth to input cjk for input, and switch back to English for navigation and vim tricks. Some binding like f[some cjk work] becomes pointless since you are effectively typing f + (ctrl + shift) + (cjk word input) + (Ctrl + Space). You would rather use nano for extensive editing cjk. However, one or two words in cjk in some codebase is okay and not that bad.

Terminal.app on the mac appears to handle cjk characters as expected (both lines output are the same length):

    $ printf "1234\n谢谢\n"
    1234
    谢谢

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