Editing Otto Jespersen (section)

===International auxiliary languages===
{{Ido sidebar |expanded=History}}
Jespersen applied both his theories on grammar and his ideas of efficiency of expression into the quest for an [[international auxiliary language]]. He was an early supporter of the [[Esperanto]] offshoot [[Ido]], collaborating with [[Louis Couturat]] and others on ''International Language and Science'' (1910), a book advocating its adoption.{{Efn|Jespersen, "Linguistic principles necessary for the construction of an international auxiliary language, with an appendix on the criticism of Esperanto"; chapter 3 (pp.&nbsp;27–41) of L[ouis] Couturat, O[tto] Jespersen, [[Richard Lorenz (chemist)|R[ichard] Lorenz]], [[Wilhelm Ostwald|W[ilhelm] Ostwald]], and [[Leopold Pfaundler|L[eopold] Pfaundler]], ''[https://archive.org/details/internationallan00pfaurich International Language and Science: Considerations on the Introduction of an International Language into Science]''. London: Constable, 1910.}}{{sfnp|Hjelmslev|1943|p=127}}

Jespersen later broke with Ido and created an alternative, [[Novial]]. His significant publications here include ''An International language'' (1928), ''Novial Lexike'' (1930), and "A new science: Interlinguistics" (1931).{{Efn|Jespersen, "A new science: Interlinguistics", ''Psyche'', vol. 11 (1931), pp.&nbsp;57–67.}}{{sfnp|Hjelmslev|1943|p=127}}

He also worked with the [[International Auxiliary Language Association]].<ref>{{Cite journal | last=Falk | first=Julia S. | author-link=Julia S. Falk | title=Words without grammar: Linguists and the international language movement in the United States | journal=Language and Communication | volume=15 | number=3 | pages=241–259 | year=1995 | doi=10.1016/0271-5309(95)00010-N}}</ref>