Suggestions for Dothraki--easily understandable in context, can be used often so that viewers can pick them up as well as us nerdy fans. Give us a general word of approval or admiration for a good feast, a good fight, or a good horse. Need a general word of scorn and contempt for sissies, dishonorable behavior, or a substandard weapon. Now to the "it is known" phrase: From the dictionary "hash yer ray nesi" did you know? If "nesi" corresponds to know, then "nesat" is probably to know. So, might be "ath-nesat-ar" or maybe even "Zhey ath-nesat". I like that one.