What are "exotic character sets"?

I am reading an c++ document, it said as this,

Wide characters are used mainly to represe开发者_StackOverflow中文版nt non-English or exotic character sets.

What's the exactly meaning for exotic character sets?

---

I think it has no "technical" meaning, it's used as in "strange" or "unusual" character sets.

Since we're talking about wide characters, in general we are actually talking about Unicode; I'd say that Cuneiform or Klingon¹ could be considered as "exotic character sets". Or even those Unicode blocks not intended for languages, but for symbols of various nature (mathematical symbols, arrows, alchemical symbols, ...).

---

1. Not actually included in the Unicode standard, but available in the PUA of some fonts (link).

---

I think the author means characters such as : § ¨ © ¢ ¡ U ï ð ¥ ¦ â ß à á â ã ¶ æ and suchlikes!

---

Maybe special charset that are used mainly for printing symbols or older charset as IBM's EBCDIC.