Totemo ii.
Gambatou!
konnichiwa.
sayoonara
konnichiwa
I dont know Japanese so i had to use the English to Japanese translator to answer this question. The phrase "Did you have a good day" translated from English to Japanese is "hi WA genki deshita ka".
Minasan, konnichiwa.
いい子 Ii ko
Literally, "I think your Japanese study is good."
The phrase "buen día" translates to "good day" in English.
good night
Ohayou Gozaimasu
"konban wa" lit. "evening is" is a phrase used to say, "good evening" in modern day Japan. It was initially part of a longer sentence but has become recognized as this simple phrase.