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JoshPet said:6.3 and higher, you can edit all wordlets right from the Admin menu.

Very user friendly.
Admin -> Edit a Language File

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Just as a warning though - if you enter \n via the admin panel, and then edit the same language file again you will find it now says \\n - edit it again and it now says \\\n and so on - so it might be best to do it via FTP.
Of course this may be a bug

There also seems to be a limit - I altered mine to give some helpful tips on deleting cookies etc., and it didn't display a thing, until I reduced the length of the wordlet.