I'm super glad that you liked it. All the best :)

Sorry, I've re-typed the text above instead of copying it straight from the description. The actual description is however correct. It says:

at most 2 times higher and not at least 2 times higher as I wrongly typed above.

Yes, I agree, therefore the function should return false in your scenario. This is exactly what this kata asks for.

Have a look at the example test case with list1. The function should return false because there too many JavaScript developers relative to the Python developers. Therefore the expected outcode of the function isLanguageDiverse is false. Exactly as in your scenario.

Thanks for the feedback,

I think that the function actually complies with your specification.

It should return true if the meetup is language diverse (number IS at least 2 times higher...)
It should return false if the meetup is not language diverse (number IS NOT at least 2 times higher...)

;-)