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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.
The word 'diffuse' should be 'defuse'. Diffuse means "spread or cause to spread over a wide area or among a large number of people." Defuse refers to disarming a bomb.
Why are these errors not fixed 6 months later? Isn't anyone reading the suggestions?