You can use META tag (<META>) to say what is the contents of your page. For example:
<meta http-equiv=Content-Type content="text/html; charset=windows-1251"> at the begining of your HTML source, says that the page is text(HTML) with windows-1251 encoding(windows-1251 - is Cyrillic one).

In you case it will be:
<meta http-equiv=Content-Type content="text/html; charset=UTF-8">


Is this you need?