I don't know if anyone there realized this yet, but the main reason on why someone would want to change the language on FF it's because we would like to understand it. To make a tutorial simply writing things as "click on settings, then select languages", etc, it's exactly as telling a blind person lost in a maze to look at the map to find the exit (!), do you think that i would be here if i could understand which one it's which??? Honestly! What you need to do, it's either wrote a tutorial that say things as "click on the first,second, third line and then unclick the 6th item, etc..." or, add pictures to it, so we can figure out which one is which. I did try to randomly select items on the menu, and i find something about the language, but no luck! There is something else that need to be changed. I am sure that many would appreciate an effective solution to this headache.....ohh and if you would give a choice to select on what language to install your browser as almost all decent software developers do, there it would be almost no need for this tutorial, a IE9 user.