
1) American play 2) Fictional language 3) Macaronic language
Found on
https://www.crosswordclues.com/clue/idioglossia

An idioglossia is an idiosyncratic language invented and spoken by only one person or very few people. Most often, idioglossia refers to the `private languages` of young children, especially twins, the latter being more specifically known as cryptophasia, and commonly referred to as twin talk or twin speech. Children who are exposed to multiple .....
Found on
http://en.wikipedia.org/wiki/Idioglossia
[play] Idioglossia is a play by Mark Handley about a girl who grows up without modern culture learning how to speak. It was first performed in 1992 at the George Street Playhouse in New Brunswick, New Jersey. The title comes from the medical term `idioglossia`, meaning an idiosyncratic language that few speak, and associated with `cryptopha...
Found on
http://en.wikipedia.org/wiki/Idioglossia_(play)

private language developed between children
Found on
http://phrontistery.info/i.html

<psychology> An extreme form of lalling or vowel or consonant substitution, by which the speech of a child may be made unintelligible and appear to be another language to one who does not have the key to the literal changes. ... Origin: idio-+ G. Glossa, tongue, speech ... (05 Mar 2000) ...
Found on
http://www.encyclo.co.uk/local/20973

(id″e-o-glos´e-ә) imperfect articulation, with utterance of meaningless vocal sounds. adj., idioglot´tic., adj.
Found on
http://www.encyclo.co.uk/local/21001

Type: Term Pronunciation: id′ē-ō-glos′ē-ă Definitions: 1. An extreme form of lalling or vowel or consonant substitution, by which the speech of a child may be made unintelligible and appear to be another language to one who does not have the key to the literal changes.
Found on
http://www.medilexicon.com/medicaldictionary.php?t=43382

idioglossia, idioglottic, idiolalia 1. A developmental speech defect in which a child substitutes different sounds for the correct ones, so that speech is intelligible only to parents or others closely involved with the child. 2. The invention and use of language by a child or closely involved siblings such as twins that is unintelligible to anyone...
Found on
http://www.wordinfo.info/words/index/info/view_unit/1140/2

a private form of speech invented by one child or by children who are in close contact, as twins. · a pathological condition characterized by speech so distorted as to be unintelligible.
Found on
https://www.infoplease.com/dictionary/idioglossia
No exact match found.