Why does PD have only English as languages options? PD is expanding, why not add popular languages like Chinese, Russian?
Translating the whole site would probably be quite costly and most people would understand most of the english words and google translate is your friend. Furthermore, I don't think devs have lots of time to attempt to redesign the whole site to suit the languages.
I didn't see much words included in whole PD site, maybe
BTC.2 or .3 will make it all translated.
Anyway, nothing is a big problem for wealthy PD.