<p>2education makes a good point. There is more to a native language that speaking it at home. My youngests attend a dual-language school. In the younger grades, they split their day half with an English speaking teacher, and half with a Spanish speaking teacher. This is to allow the kids to speak both languages every day at school.</p>
<p>Many of the parents of these children speak Spanish, and very little English. Many of her classmates speak Spanish at home, but they are not really fluent - they speak enough to get by communicating with their parents, but are not comfortable speaking in the classroom setting. Their home language is Spanish, but their Primary language is English - and they should list English as their native language.</p>
<p>To the OP - in which language do you normally think? If you were to read a math question (so all numerals, no words), in which language do you read it? If I hand you an instruction manual in 10 different languages, which do you turn to immediately? These are all indicators of your dominant language, and if that is English, you should feel confident it listing it as your native language.</p>