language on my website

I am trying to make a website where you can learn how to solve the rubik’s cube:

I typed all the code and text in the regular english language and used the english aflabet. But for some unknown reason the text on the website turns into the greek alfabet. Can anybody help me because i don’t know how to change it and i just want it to be in english.

P.S. It doesn’t just happen on my computer. when a friend went to my site the exact same thing happen

I checked your site but it looks fine from here.