Speakers of a lower language may make so little progress in learning the dominant speech, that the masters, in communicating with them resort to 'baby talk'. This baby talk is the master's imitation of the subject's incorrect speech[...] The subjects, in turn, deprived of the correct model, can do no better now than to acquire the simplified baby talk version of the upper language. The result may be a 'conventionalized jargon'.
- Bloomfield (1935), a pag.472