>this person vastly underestimated the number of pidgins and creoles that have popped up ad-hoc The key adjective that you quoted is "interlinguistic" which is

>this person vastly underestimated the number of pidgins and creoles that have popped up ad-hoc The key adjective that you quoted is "interlinguistic" which is a planned language for international communication. From the wikipedia page[1]: >Interlinguistics, as the science of planned languages, has existed for more than a century as a specific branch of linguistics[1] for the study of various aspects of linguistic communication. Interlinguistics is a discipline formalized by Otto Jespersen in 1931 as the science of interlanguages, i.e. contact languages tailored for international communication. As you said, pidgins & creoles are unplanned/organic/adhoc -- so they're not deliberately interlinguistic. [1] https://en.wikipedia.org/wiki/Interlinguistics https://en.wikipedia.org/wiki/Interlinguistics