Children acquire their native language, which falls within a wide range of languages, at a very early stage of development. During development, a baby begins to show signs of verbal communication, usually starting with cooing, babbling, recognizable words, and later with two or more phrases of words. This event is also seen in the development of second languages. Second language acquisition is the study of how second languages ​​are typically developed. The process of acquiring our native language is very similar and influential to the development of a second language. Developing a second language has become increasingly popular around the world. Today, more and more people are growing up with adequate resources to acquire a second language, as can be seen from the vast number of bilingual individuals. As stated previously, “Second language acquisition is the study of how an additional language develops in a child's life” (Gas & Selinker, 2008). According to researchers David and Wei (2008) "evidence seems to suggest that the language development of bilingual children is generally the same as that of monolingual children" (p.599), meaning that these children go through the same process starting with babbling, followed by single-word sentences and progressing to a more developed multiword stage. How a child develops his first language becomes a guide to the development of a second language. Children can use the language skills they acquire while learning their L1 (first language) to help them learn foreign languages. Research has shown that “both L1 and L2 are tools that perform complementary and sometimes overlapping functions” (Kohnert, 2008). Whether to use the first language or the second language m...... middle of the paper...... Acquisition vs. learning a second language: denial of English. Philologica Jassyensia, 5(2), 89-94. Retrieved from EBSCOhost.David, A., & Wei, L. (2008). Individual differences in the lexical development of French-English bilingual children. International Journal of Bilingual Education and Bilingualism, 11(5), 598-618. doi:10.2167/beb478.0Gass, S. M., & Selinker, L. (2008). Second language acquisition: an introductory course. Google Books. Retrieved April 14, 2011, from http://books.google.com/books?hl=en&lr=&id=fhnbMj597-4C&oi=fnd&pg=PP1&dq=secondKayser, H. (2004). Biliteracy and second language learners. The leader of ASHA. Retrieved April 13, 2011, from http://www.asha.org/PublicationKohnert, K. (2008). Second language acquisition: Success factors in sequential bilingualism. The leader of ASHA. Retrieved April 13, 2011, from http://www.asha.org/Publication