A lingua franca, cried a brig leid or vehicular leid an aw, is a leid seestematically (as opponed tae occasionally, or casually) uised tae mak communication possible atween persons nae sharin a mither tongue, in particular when it is a third leid, distinct frae baith mither tongues.[1]

References

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  1. Viacheslav A. Chirikba, "The problem of the Caucasian Sprachbund" in Pieter Muysken, ed., From Linguistic Areas to Areal Linguistics, 2008, p. 31. ISBN 90-272-3100-1