I wanted to know what the difference between the en_au, en_ca, en_gb and en_nz language files were so I created a java application to process though them all and find entries that didn't match and output them into a readable format which you can find here Gist (GitHub)

Upon reading the output I discovered a few spelling/grammar mistakes. (Already created a bug report, Although I accidentally put it under Mojang Web Services so hopefully they can move it under Minecraft)

Some examples are: Line: 1184 – Should be 'failed' instead of 'faille d' Line: 1264 – Should be 'last' instead of 'lost'

There are more I'm just far to lazy to go though and list them all xD

Note: 'null' means that the specific entry doesn't exist in that language file or it does but it's a blank string. '???' is due to the file being encoded in 'UTF-8'. Every entry listed means that one or more of the four lines has a change, this change could be anything from a single character to the whole line.