0 the language that someone learns to speak first --
1 the language you learn from your parents as you are growing up --
This is not an exclusive criticism to first language research.
Establishing scientific methods for the study of first language acquisition.
From it, researchers will gain a clear understanding of the importance of the parser in first language development.
Language attrition, whether in a first language or a second, is increasingly recognized as a normal part of changes in proficiency over time.
Codeswitched items will occur at relatively unpredictable points in discourse, but then only surface again, in relatively predictable situations, in first language discourse.
This brings up another point - the impact of the first language on swearword orientation in the second.
There are always situations in which people will prefer the texts to be in their first language.
First, the issue of language is a sensitive one and is of concern in first language and most certainly in second language research.