You're probably wondering what you just printed to the screen when you wrote:
say "Hello World!"

What you printed is a string, a sequence of characters. You may be familiar with strings from some other languages like C. But these are not your father's strings...

If you're not English-speaking, you can just as easily:

• say "こんにちは世界"
• say "Chào thế giới"
• say "你好，世界"

Perl6 supports unicode everywhere.