detect international character in email address

Hi,

I have to detect below international characters in an email address in ABAP.

If present, I have to put a flag on. Please advise.

• Latin Alphabet (with diacritics): Pelé@example.com
• Greek Alphabet: δοκιμή@παράδειγμα.δοκιμή
• Traditional Chinese Characters: 我買@屋企.香港
• Japanese Characters: 甲斐@黒川.日本
• Cyrillic Characters: чебурашка@ящик-с-апельсинами.рф

Thanks

Arindam