Re: What is "Come on" in your language?
頑張れ! (ganbare) or 頑張って! (ganbatte!) for encouragement.
よし! (yoshi!) for cheering after a good point or winning.
(For a player himself/herself to praise his/her own good point, it's probably やった! (yatta!) = did it!)
Inconvenient as it is, we don't have a single word that can be used for both encouraging and praising.
JUAN CARLOS FERRERO FOREVER!!
Also supporting Rafael Nadal, Kei Nishikori, Lleyton Hewitt
David Ferrer, Andy Murray, Juan Martin Del Potro, Nikolay Davydenko, David Nalbandian
Goran Ivanisevic and Marat Safin
#3 Ferrero Tard