Code that treats UCS-2 as "wide ASCII" can be subtly wrong even for western european languages. For multiple reasons, Unicode has multiple representations for t

Code that treats UCS-2 as "wide ASCII" can be subtly wrong even for western european languages. For multiple reasons, Unicode has multiple representations for the same glyph[1], so if you have ü, it can either be a the two bytes 00FC[2], or u followed by the ¨ diacritic U+0308. If you don't account for this things like "reversing a string" or "give me a substring" or "how long is the string on screen" will be subtly buggy. If you handle UCS-2 correctly, then it's fine and a reasonable technical limitation, but the emphasis of that sentence is on correctly. [1]: https://en.wikipedia.org/wiki/Unicode_equivalence https://en.wikipedia.org/wiki/Unicode_equivalence [2]: https://www.compart.com/en/unicode/U+00FC https://www.compart.com/en/unicode/U+00FC