"Create new world" screen shows an alias command (xp)
In 17w45a, the /xp command has become an alias of /experience, so the world customisation screen should show the real command instead.
Created Issue:
"Create new world" screen shows an alias command (xp)
In 17w45a, the /xp command has become an alias of /experience, so the world customisation screen should show the real command instead.
Added Affects Versions: 17w46a
Added Affects Versions: 18w02a
Added Assignee:
[Mojang] Nathan Adams

As they both exist, I don't think it really matters that much. "/experience" wouldn't fit either, it's too long.
this isn't fixed in 18w14b
It is fixed for English (US), it will be fixed for other languages later.
@elyg update the string in your language on Crowdin and you will see it in a future snapshot