The poster is for the Language Matters campaign. Just wanted to use profiles with different colors to con notate the different ethnic groups, and emphasize the most important part of the whole campaign. Also tried to keep it simple to have a more readable posters since it communicates the message in two languages.
They estimate that there are 7,000 languages in the world today but if we take Australia's example you can make a better picture of the problem in your mind. They say that when Europeans arrived in Australia they were 250 languages on record spoken at the time but this have been reduced to only 17 transmitted to the younger generations.