是的. 考试之前说加油-Good luck! 比赛的时候啦啦队喊加油-come on!若是喊着某个名字加油(中国队加油)-chi-na!chi-na!就可以了! 鼓励别人的时候说cheer up!。

I think you're looking for a literal translation, when it's an idiomatic expression. To encourage or support someone, "good luck" works just fine.