From what I know, japanese letters and general symbols they use start from 0x3000.
I used https://symbl.cc/en/ to try few different ranges and see what results I'll get.
Keep in mind I kept using MS Gothic font, so many characters were shown as squares (but behavior of those squares were different)
0180 range - Latin Extended - do not have problems whatsoever
0370 - Greek characters - no problems
Arabic-like languages skipped, since they're right-to-left and symbols appear at start of filename despite being typed in the end
0e00 - Thai - no problems
1800 - Mongolian - no problem, except font drawing changes for whole filename, if there are visible Mongolian characters in line. If characters are cut off (left panel made narrower) - font returns to normal
1E00 - Latin Extended Additional - My font cannot show them, but squares do not jump around as I change panel width, and I believe they would show fine if I used compatible font
2c60 - Latin Extended-C - same as above
2E80 - CJK radicals - the problem I mentioned appears.
Basically, to replicate this you can:
set font to something supporting japanese (if you use random font, japanese character would still be shown using substitute font and won't be consistent with ascii characters)
create folder/file named "世界中のあらゆる情報を検索するためのツールを提供しています。さまざまな検索機能 を活用して、お探しの情報を見つけてください" (random string from google)
change Far panel width using alt+left, alt+right and see how file name behaves. If it's shorter than file panel - then everything is alright. When you shrink the panel, letters are being compressed too forcefully and in the end you have to enable monowidth to be able to distinguish characters
I used https://symbl.cc/en/ to try few different ranges and see what results I'll get. Keep in mind I kept using MS Gothic font, so many characters were shown as squares (but behavior of those squares were different) 0180 range - Latin Extended - do not have problems whatsoever 0370 - Greek characters - no problems Arabic-like languages skipped, since they're right-to-left and symbols appear at start of filename despite being typed in the end 0e00 - Thai - no problems 1800 - Mongolian - no problem, except font drawing changes for whole filename, if there are visible Mongolian characters in line. If characters are cut off (left panel made narrower) - font returns to normal 1E00 - Latin Extended Additional - My font cannot show them, but squares do not jump around as I change panel width, and I believe they would show fine if I used compatible font 2c60 - Latin Extended-C - same as above 2E80 - CJK radicals - the problem I mentioned appears.
Basically, to replicate this you can:
Originally posted by @AndyScull in https://github.com/Maximus5/ConEmu/issues/739#issuecomment-226731465