Schematic planned language

A schematic planned language is a type of constructed language whose grammar and morphology have been deliberately simplified and regularized, with idiosyncrasies from source languages (if any) removed, in order to be simpler and more streamlined than those of the ethnic languages, even if this should make the language's vocabulary relatively unrecognizable to newcomers to the language. The theory, which seems to be born out by experience, is that this will make the language easier to learn to use actively than are any of the ethnic languages, or even the naturalistic planned languages.

The best known examples of this type of language are Volapük, Esperanto and Ido.