<p>If you read the SAT II requirements for Harvard, the verbage indicates that if a language is your mother tongue, they would rather you take another subject to fulfill the 2 subject requirement. So there is definitely a bias for someone using a language test which they have learnt from childhood.</p>
<p>“Students should not submit two Subject Tests in mathematics to meet this requirement. Candidates whose first language is not English should ordinarily not use a Subject Test in their first language to meet the two Subject Tests requirement.”</p>
<p>[Harvard</a> College Admissions § Applying: Requirements](<a href=“http://www.admissions.college.harvard.edu/apply/application_process/requirements.html#scores]Harvard”>http://www.admissions.college.harvard.edu/apply/application_process/requirements.html#scores)</p>
<p>On a side note, there are middle schools in Houston allowing native spanish speakers to complete AP spanish test in 7th or 8th grade without going through the multiple levels of classes.</p>