1. Are feelings, emotions and facial expressions universal across borders, happy, sad, etc..?
Yes.
When I stayed with my hostfamily in the U.S, I could tell my feelings to my host family.
When I cried, my host mother helped me.
When she is happy to play with her baby, I was happy, too because I could her happy emotion.
So, I think that feelings are universal.
2. Are feelings, emotions and facial expressions universal across borders, happy, sad, etc..?
Japanese English
楽しい happy
嬉しい pleased
悲しい sad
楽しい fun
おもしろい interesting
いらいら irritage
興奮する excited
どきどき nervous
悔しい regretable
だるい lazy
3. Are there any feelings in Japanese that cannot be translated into English?
I think "mukatsuku" is hard to translate in English.