Many researchers have assumed that adult bilinguals have separate systems for their two languages. Such an assumption raises interesting questions about how the two languages are acquired in the case of a child learning two languages simultaneously. This study attempts to determine whether the two languages are acquired separately right from the beginning or whether at first they form a single system and only become separated at a later point. A phonological analysis is presented of a Romanian-English bilingual child's spontaneous speech at age two, and the processes operating in the two languages are compared. Specifically, sound inventories, segmental substitution patterns, final consonant deletion, deletion of unstressed initial syllables, cluster reduction, glottal stop insertion and the insertion of weak vocalic segments were examined in both languages. Since the same phenomena were found to occur in both English and Romanian, it is concluded that there is only one system through which both languages are being processed at age two. (Author)