The language which a person first learned and spoke as a child and the language in which he/she continues to be fluent.

Primary language spoken by the student.

The language in which an individual is most proficient; also called dominant language.

The first language a child learns.

the first language learned, generally the language spoken at home.

The language first acquired by a student, In the Home Language Survey, this is defined as the language the student first learned, the language used by the student most frequently at home, the language spoken most frequently by the parents with the student, or the language most often spoken by the adults at home. (R-30 Language Census).