Constructed languages introduced in the 1980s

Lojban (pronounced ) is a logical, constructed human language created by the Logical Language Group, which aims to be syntactically unambiguous. It succeeds the Loglan project.

Láadan () is a gynocentric constructed language created by Suzette Haden Elgin in 1982 to test the Sapir–Whorf hypothesis, specifically to determine if development of a language aimed at expressing the views of women would shape a culture; a subsidiary hypothesis was that Western natural languages may be better suited for expressing the views of men than women. The language was included in her science fiction Native Tongue series.

constructed language created by Robert Ben Madison in 1980

Uropi is a constructed language which was created by Joël Landais, a French English teacher. Uropi is a synthesis of European languages, explicitly based on the common Indo-European roots and aims at being used as an international auxiliary language for Europe and thus contributing to building a European identity.