desuka means
"Korewa ikura desuka?" is a Japanese phrase and in English it means "How much does this cost?"
nande desuka ?
"will you be alright without sleep" is the literal meaning.
"o genki desuka?" means "how are you?" "nani ka atta?" means "what's up?" I think they're both formal.
(Honorific) O-genki desuka? (do not pronounce the "u") Genki desuka? (formal) genki? (informal) Ikaga desuka? (use this when talking to someone you respect highly or do not know)
"Daijobou" has been translated- (with my reasearch) into "How Are You?" Daijoubu Desuka actually translates into "Are you ok!?" as opposed to "How are you" which is Ogenkai Desuka?. Daijoubu Desuka would be used if someone has an accident ^^
Eigo = English (language) Nan desuka = what is it? Usually, people say "Eigo wa nan desuka?" = "What is english (the language?)" Or, even more common: "Eigo de nan desuka?" = "What is that (whatever you said before) in English?" ie. "Can you please translate that into English for me?"
sabishii desuka
ogenki desuka?
hounto = really, very desuka = is this true? (the aforementioned) Hounto desuka? = Is that true? Is it real?
Ogenki Desuka?
O-Genki Desuka.