Margaret Langdon (c. 1926 in Louvain, Belgium – October 25, 2005) was a US linguist who studied and documented many languages of the American Southwest and California, including Kumeyaay, Northern Diegueño (Ipai), and Luiseño.
[1] Langdon (née Storms) was born in Belgium and immigrated to the United States following World War II.
[2] Her doctoral thesis was a dictionary of the Mesa Grande dialect of Diegueño.
[3] Langdon worked with various tribal elders throughout her career on southwestern languages.
[5][6] She was an advisor to 17 graduate dissertations in linguistics, addressing such languages as Navajo, Palauan, Mojave, Havasupai, Seri, and others.