I played it in its American version on my OLD 3ds XL console and yes... there are drops in fps but it is playable!
An hour ago I installed the American version of Senran Kagura 2 - Deep Crimson and it runs perfect!
My native language is Spanish but I always try to improve my English (also with the help of the google translator) I know this forum a lot because of the posts on Nintendo 3ds and other Nintendo consoles! :) Greetings to all.