0 the language that someone learns to speak first
1 the language you learn from your parents as you are growing up
It may be a means to promote balanced bilingual development and to avoid first language loss.
Human beings learn to speak (or sign) at least a first language without classroom instruction.
Second language acquisition necessarily has different historical contingencies than first language acquisition, not the least of which is that the learner already knows a language.
Other studies have found that the stress patterns of the first language may transfer into the second language.
Results indicated that both groups (monolingual and bilingual) showed superior recall performance for words and nonwords in their first language.
First language attrition and the parameter setting model.
For instance, we have already suggested that the first language pattern may be initially imported into the second language.