olemus
keel, mis pole tekkinud loomuliku arenguga,vaid on teadlikult loodud mingiks otstarbeks
= a language instead of having developed naturally, is consciously devised for some purpose

ülevaateid
https://en.wikipedia.org/wiki/Constructed_language
https://en.wikipedia.org/wiki/List_of_constructed_languages
https://en.wikipedia.org/wiki/Artificial_language

vt ka
- formaalkeel
- metakeel
- pasigraafia
- programmikeel