I think English has a million of ways to say, “That’s great!” Okay, maybe not a million, but definitely a ton! Here are a few:

That’s good
Awesome
Fantastic
Wonderful
Super
Super-duper (It’s a little silly, but it still works.)
Fabulous
Groovy
Woohoo
Sensational
Terrific
Superb
Tremendous
Beautiful
Excellent
YAY
Yahoo
Yeehaw (That’s the Texan way!)
Perfect
Clever
Yes, that’s it
WOW
Dynamite