Amadoda
You can say "Enkosi" to say 'thank you' in Xhosa.
mister in xhosa
"Green" in Xhosa is "luhlaza."
To say "please reply to email" in Xhosa, you can say "Ndiphethe kwi-imeyile."
i think you say tati
Khuthla say: goo-thlaa
Umthi wasapho.
you would say Ukutya okumnandi
Impossible to say.
According to Wikivoyage's Xhosa phrasebook, "hello" is "molo" and "goodbye" is "uhambe" or "usale kakuhle".
khumbula
There are many ways to say goodbye in Xhosa stay well - sala kukuhle stay well (to many) - salani kakuhle go well - hlala kakuhle go well (to many) - salani kakuhle until we meet again - sobonana