To include Unicode-encoded contents in text variables, use the syntax \uXXXX, where XXXX is the four-digit hexadecimal code point, or escape character, for the Unicode character. The Flash authoring tool supports Unicode escape characters through \uFFFF. To find the code points for Unicode characters, see the Unicode Standard at Unicode.org.
You can use Unicode escape characters only in text field variables. You cannot include Unicode escape characters in external text or XML files; Flash Player 6 does not recognize Unicode escape characters in external files.
For example, to set a dynamic text field (with the myTextVar instance name) that contains Japanese, Korean, Chinese, English, and Greek characters and the Euro sign, enter the following:
myTextVar.text = "\u304B\uD55C\u6C49hello\u03BB\u20AC";
When the SWF file plays, the following characters appear in the text field:

For best results when creating a text field that contains multiple languages, use a font that includes all the glyphs your text needs.