The world's languages are written in a number of scripts. This sentence
(unless you're reading it in translation) is written in Latin, while Russian is
-written in Cyrllic, and Greek is written in, well, Greek; Japanese mainly in
+written in Cyrillic, and Greek is written in, well, Greek; Japanese mainly in
Hiragana or Katakana. There are many more.
The Unicode Script property gives what script a given character is in,