What is a language used to design websites?

HTML (Hyper Text Markup Language)

It depends what language the person who created the site spoke for well most sites are written in English because,it is one the most common language.The second most common is Chinese(there are two types of Chinese manderan,and cantonese)(the most comman of the two is cantonese).Hope that helped...................

love,

xoxo*warriorcatsgirl*xoxo

P.S you can check out my website if you want it's new and based on my fav book warriorcats by Erin hunter it's www.warriorcatscrazy.wetpaint.com Enjoy!!