If the idea seems valid, letting that happen will result in the discourses flooded with this kind of requests. Not sure it's a good idea.

...On the other hand, FArekkusu's answer is as sympathetic and useful as usual: "you cannot solve it in the current languages? no problem! translate it!"
Yeah sure... x/

For me a suggestion for translation request seems ok.there are not many people accepting them but still it seems for me to be in scope of Suggestion flag.

You don't. If you want some kata to be available in another language, translate it yourself.

How else am I going to request a C# translation for this Kata?

Not a suggestion.

Somebody please open this for C#.

Slowly trimming the string from the start is going to hurt performance, and is unnecessary. Your words are split with either a ' ', or with a '-', so you can just use those two characters as the delimiters when splitting the string into multiple words, and process those instead, without touching the original string.

Good point!