I should note that Codea uses Lua too: http://twolivesleft.com/Codea
You can even code on the iPad itself, and use Codea Runtime to convert it to Objective-C: https://github.com/TwoLivesLeft/Codea-Runtime
You can even code on the iPad itself, and use Codea Runtime to convert it to Objective-C: https://github.com/TwoLivesLeft/Codea-Runtime
It is used professionally for far longer than some 'enterprisey' languages are around.