(1)

Duplicate Key -> "冻结关键帧" (Which means "freeze key" in Chinese)  

"复制关键帧" may be better.

(2)

Sprite sheet -> "雪碧表"( "雪碧" is the Chinese name of "Sprite", a carbonated beverage)

"精灵序列图" or “精灵表单” may be better.

Thank you, will be fixed for next update !

0.12.2 with fixed translation, thank you