A few references:
Harrison, K.M., Sadiku, M., & Tochon, F.V. (2018, in press), Displacement Planet Earth: Plurilingual Education and Identity for 21st Century Schools. Blue Mounds, WI (USA): Deep University Press.
Skutnabb-Kangas, T., Maffi, L., & and Harmon, D. (2003). Sharing a world of difference. The Earth’s linguistic, cultural, and biological diversity. Paris, France: UNESCO Publishing. UNESCO, Terralingua, and World Wide Fund for Nature. Available at http://www.terralingua.org/blog/2003/07/16/sharing/.