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Collections are a way for you to organize kata so that you can create your own training routines. Every collection you create is public and automatically sharable with other warriors. After you have added a few kata to a collection you and others can train on the kata contained within the collection.
Get started now by creating a new collection.
"case (in)sensitivity" is a pretty standard term, I'd get used to it
Not a kata issue, a suggestion at best.
I don't think this is an issue, "ignore letter case" means the same as "case insensitive", I don't see how this is an improvement.