That's not Welsh. It's the rot13 of the Welsh phrase in the comment replied to.

That's pretty much the point that I was making. When I see text that looks like a rot13 encoded string, it's usually Welsh. Other than one unlucky vowelless word, neither the original Welsh nor my reply look more plausibly real than the other.

Aeolun phrased it well!

I don't speak any Welsh. I've never even been to Wales. I still knew what that phrase meant and was able to identify you had rot13d it.

Failing to understand languages isn't as impressive as you think.

I'm sorry, I thought that we were involved in friendly discussion. I did not realize that this discourse is antagonistic for you. You are 100% correct and you win the argument that I did not realize you had.

Interesting fact: despite the common jibes about lack of vowels, Welsh has 7 vowels whilst English has 5! Like WiFi, just because you can't see it doesn't mean it doesn't exist.