[divanvisagie]

I personally think this exercise is rather odd in the first place. A lot of modern languages seem to have a same base syntax and these comparisons over simple operations is like taking all of the latin based languages and showing all the words that look similar.

[pkolaczk]

Actually Kotlin is just Scala dumbed down by taking out the most powerful and interesting features like higher kinds, implicits, monads or macros. Which makes it just a Java 8 with a bit nicer syntax.