http://www.bbc.co.uk/history/interactive/timelines/language_timeline/index_embed.shtml
http://learnenglish.britishcouncil.org/en/britain-great/english-great-part-1
http://learnenglish.britishcouncil.org/en/britain-great/english-great-part-2
http://ed.ted.com/lessons/how-did-english-evolve-kate-gardoqui
http://www.childrensuniversity.manchester.ac.uk/interactives/literacy/wordcla…
http://prof.danglais.pagesperso-orange.fr/animations/historyofenglish/worldtw…