Greasy Fork is available in English.
Show "Apprentice 3" instead of "Apprentice", etc.
< Opiniones de WaniKani Show Specific SRS Level in Reviews
I am no longer supporting this script, but replacement scripts have now been posted by other users. Hopefully one of those works for you.
As of the newest wanikani update, this has stopped working for me (in firefox). Would love an update.