Ed Code 48985
When 15 percent or more of the pupils enrolled in a public school that provides instruction in kindergarten or any of grades 1 through 12 speak a single primary language other than English, as determined from the census data submitted to the Department of Education pursuant to Section 52164 in the preceding year, all notices, reports, statements, or records sent to the parent or guardian of any such pupil by the school or school district shall, in addition to being written in English, be written in such primary language, and may be responded to either in English or the primary language.