My site uses polish language. I'd like to build in some text strings (with special polish characters) into my page.tpl.php, but I can't find how to do this. When I try to insert a string like this:

print t('"cześć" means "hello" in polish');

...I only get output like this:

"czesc" means "hello" in polish

(special polish characters are swaped by their equivalent from ASCII table).
Can you help me?