Introduction -- Part 1: Contact-induced change between closely related languages -- Convergence in the Baltic-Slavic contact zone: Triangulation approach -- Convergence and congruence due to contact between the South Slavic languages -- The case of Czech-Slovak language contact and contact-induced phenomena -- Belarusian and Russian in the Mixed Speech of Belarus -- Lingua Franca in the Western Mediterranean: between myth and reality -- Intimate family reunions: code-copying between Turkic relatives -- Part 2: Contact-induced changes in scenarios with looser family ties -- Language contact in a multilingual setting: The attractive force of Italo-romance dialects on Italian in Montreal -- Balkan Slavic and Balkan Romance: from congruence to convergence -- The convergence of Czech and German between the years 900 and 1500 -- Part 3: Typological congruence and perceived similarity -- Contact-induced language change and typological congruence -- Similarity effects in language contact: Taking the speakers' perceptions of congruence seriously -- Doing copying: Why typology doesn't matter to language speakers -- South Siberian Turkic languages in linguistic contact: Altay-kiži nominalizer constructions as a test case -- French meets Arabic in Cairo: discourse markers as gestures -- Language mixing and language fusion: when bilingual talk becomes monolingual -- Part 4: "Doing being family": language families and language ideologies -- Siblings in contact: the interaction of Church Slavonic and Russian -- Transparency of morphological structures as a feature of language contact among closely related languages: Examples from Bulgarian and Czech contact with Russian -- Avoiding typological affinity: "negative borrowing" as a strategy of Corsican norm finding.

Sociolinguistic and areal factors promoting or inhibiting convergence within language families.