I-IV -- Contents -- Contributors -- Introduction -- 1. Levelling -- Dialect contact and koinéization: the case of northern France -- The depicardization of the vernaculars of the Lille conurbation -- Jordanian and Palestinian dialects in contact: vowel raising in Amman -- "Salience" as an explanatory factor in language change: evidence from dialect levelling in urban England -- My Dad's auxiliaries -- 2. Convergence -- Mette a haout dauve la grippe des Angllaïs: convergence on the Island of Guernsey -- Modern Greek: towards a standard language or a new diglossia? -- Standard English and the lexicon: why so many different spellings? -- Latin and Arabic evolutionary processes: some reflections -- There's sheep and there's penguins: convergence, "drift" and "slant" in New Zealand and Falkland Island English -- 3. Adaptive mechanisms -- Convergence in the brain: the leakiness of bilinguals' sound systems -- Language contact in early bilinguals: the special status of function words -- 4. Code-copying -- Contact-induced change in a code-copying framework -- Karaim: a high-copying language -- Author index -- Subject index