Java:

• Missing fixed tests.
• Random tests are so wide-spread and few that one can get lucky: https://www.codewars.com/kata/reviews/646f983d60b6ad00016a3196/groups/6470d5ce32bedc0001e67dae
• Description states that all elements in array are unique. Random tests do not guarantee this.
• Overall I am not really sure if Java fits the original intent of this kata as you cannot "be concise" with arrays in Java and have to write as much code as with a normal loop so the kata degrades to codegolf the Java boilerplate.

Python, I haven't looked at others. Might be a good idea to have the golf limit as a comment in the example solution code, instead of the description, if it's not something that can be changed per language.

Which language am I missing?

Description doesn't take into account each language-specific character limit.

I updated the description to reflect each language character limit in my CoffeeScript update

But no telling if anyone will ever aprove it