Hello.
Me and a group of a fellow aspiring rationalists work on Russian translation of LessWrong.
The project is considerable; I think it is worthy of a paid second-level domain.
Too bad rationality.ru is already taken. So are rationalist.ru, ratio.ru and similar others.
Well, there is an option. Would it be impudent of us to store our translations in the lesswrong.ru?
Loan-word is clearly the praviliniy (correct) choice in this case. Loan words are actually good signaling IMO - here is something from another language that's cool enough to adopt.
That also can indicate something like "There is a community which prefer to be closed for new members and that's why they use some words that only they can understand clearly". I believe that the web-site with translations should be understood by people, who did not read lesswrong.com in English some time ago, and can not see familiar words. The more terms can be correctly comprehended by newcomers, the better for this rationalists community.