AB language
In English philology, AB language refers to a variety of Middle English found in the Corpus manuscript, containing Ancrene Wisse (whence 'A'), and in MS Bodley 34 in Bodleian Library, Oxford (whence 'B'). The Bodley manuscript includes what is known as the Katherine Group.
The term was coined in 1929 by J. R. R. Tolkien who noted that the dialect of both manuscripts is highly standardized, pointing to "a 'standard' language based on one in use in the West Midlands in the 13th century." AB language is 'characterized by French and Norse loanwords, colloquial expressions, conservative spelling, and similarities to Old English syntax'.
AB language also characterises the Middle English religious works of the Katherine Group and the Wooing Group.
See also
Mercian dialect
Notes
References
Corrie, Marilyn. 2006. "Middle English - Dialects and Diversity". The Oxford History of English. Ed. Lynda Mugglestone. Oxford: OUP, pp. 86-119.
Crystal, David. 2004. The Stories of English. London: Penguin, chapter 9.