Thanks for your suggestion, but the design of the kata won't be changed now, it has been the same for more than ten years and changing it would invalidate all submitted solutions.

If there are two or more oldest age, then return both of them in array format, would've been better formatted as

If there are two or more oldest age, then still return only an array of two repeated numbers. For example:
[99,99,98] should return [99,99].

It's not necessary to post solutions anywhere. If someone wants to translate this kata to kotlin, they can just write their own solution. If you want to discuss a particular solution, use the solutions page.

Ah, I apologize for my mistake. I'm new here and this literally my first comment. I shall be mindful in the future. Where should I post this for future reference? Do I message the creator?

Approved by someone

Please:

• mark your comment as a spoiler when posting code
• use appropriate formatting when posting code
• don't post solutions in the discourse

Not a kata suggestion. See https://docs.codewars.com/training/troubleshooting/#post-discourse.