Differential Object Marking (DOM) is vulnerable to change in heritage speakers of Spanish and heritage speakers of Hindi. DOM is also vulnerable to L1 attrition in Spanish-speaking first-generation immigrants but not in Hindi immigrants. This chapter examines DOM vulnerability in Romanian. The chapter describes the sociolinguistic characteristics of the Romanian-speaking population in the United, followed by a summary of the overall results of the linguistic background questionnaire and the linguistic tasks. The overall results show that, compared to the Spanish and Hindi-speaking populations, the Romanian-speaking population in the United States is far less numerous, yet their Romanian language skills remain relatively strong compared to the other two groups. The accuracy with DOM of the first-generation Romanian immigrants on all linguistic measures did not differ from those of the Romanian speakers in Romania. Just like in the Hindi study, there appears to be no evidence of language change in the homeland nor signs of attrition of this phenomenon in the first-generation adult immigrants sampled in this study. Yet, DOM and accusative clitic doubling (CD) were found to be somewhat vulnerable to omission in heritage speakers, especially in those exposed to English since birth or very early in life (the simultaneous bilinguals).

The study presented in this book focuses on the acquisition, maintenance and change of Differential Object Marking (DOM) in Spanish, English and Romanian in contact with English in the United States. Differential Object Marking (DOM) is the overt marking of some direct objects and is a widespread among languages of the world. DOM is an iconic procedure because the arguments that are overtly marked morphologically are more salient/prominent semantically or pragmatically than unmarked objects. This chapter describes how DOM is manifested in Spanish, Romanian and Hindi and presents current syntactic synchronic analyses of the phenomenon in these languages. The diachronic evolution of DOM in language contact situations is also discussed.