Bilingual acquisition data: longitudinal corpus_FerFuLice dataset

This corpus contains spontaneous productions from a longitudinal study of two English/Spanish bilingual identical twins with the pseudonyms of Simon and Leo. They were born 28-DEC-1998 into a middle-class family in Spain. The father is a native speaker of Peninsular Spanish, and the mother is a native speaker of American English. The father always speaks to the children in Spanish and the mother always addresses them in English. The parents generally communicate in Spanish with each other, except on summers when they travel to the United States for approximately two months or when a monolingual English speaker is present. Therefore, we are dealing with bilingual English/Spanish first language acquisition in a monolingual-Spanish social context, a type of bilingualism that is referred to in the literature as individual bilingualism (Bhatia and Ritchie, 2004).