User blog comment:Kirkburn/Technical Update: April 23, 2013/@comment-1175135-20130430045704/@comment-1175135-20130502123750

This only seems to work for plaintext, not for files 100ks long and with embedded HTML tags or other formatting, nor the plaintext copies of their source. Try to edit http://edgeworld.wikia.com/User:Alysdexia/diffs/translations somewhere and click Show changes to see what I mean.