The document discusses second language acquisition. It defines a second language as any language learned after one's first or native language. Acquiring a second language is often a lifelong process, and most learners do not become fully native-like in the second language, though considerable fluency can be achieved with practice. Some research suggests the defining difference between a first and second language is the age at which they are learned, with a second language referring to one learned after puberty, and people generally do not achieve the same level of fluency in a second language as their first.

1. ASLBY:FERNANDA LARA FOR:ALEXANDER CITA

2. ASLA second language (L2) is any language learned after the first language or mother tongue (L1). Some languages, often called auxiliary languages, are used primarily as second languages or lingua francas.

3. SpeedAcquiring a second language can be a lifelong learning process for many. Despite persistent efforts, most learners of a second language will never become fully native-like in it, although with practice considerable fluency can be achieved

5. AGEAccording to some researchers, the defining difference between a first language (L1) and a second language (L2) is the age the person learned the language. For example, linguistEric Lenneberg used second language to mean a language consciously acquired or used by its speaker after puberty. In most cases, people never achieve the same level of fluency and comprehension in their second languages as in their first language. These views are closely associated with the Critical Period Hypothesis.