34 CFR § 300.29 - Native language.

(a) Native language, when used with respect to an individual who is limited English proficient, means the following:

(1) The language normally used by that individual, or, in the case of a child, the language normally used by the parents of the child, except as provided in paragraph (a)(2) of this section.

(2) In all direct contact with a child (including evaluation of the child), the language normally used by the child in the home or learning environment.

(b) For an individual with deafness or blindness, or for an individual with no written language, the mode of communication is that normally used by the individual (such as sign language, Braille, or oral communication).

(Authority: 20 U.S.C. 1401(20))