Another definition of ‘idiolect’ is that of a "person's incomplete or erroneous grasp of their language, where this latter is inherently social."
By way of example, this relatively well-educated teflpedia editor, brought up in a posh part of South West London in the 1960s, was unaware of the "brought" forms of the verb "bring" until coming across a list of irregular verbs - for EFL students - during his teacher training... His idiolect had the non-standard usage: bring, brang, brung.
- The Compact Oxford English Dictionary askoxford.com
- Merriam-Webster Online Dictionary
- Wittgenstein, L. (1953) Philosophical Investigations, translated by G. E. M. Anscombe, 3rd edition, 1967, Oxford: Blackwell
- The Stanford Encyclopedia of Philosophy