<p>Yes, highest level completed is typically what counts.</p>
<p>Note that many colleges have foreign language graduation requirements that may be higher than admission requirements. Taking additional foreign language in high school may help with the graduation requirements (e.g. by allowing skipping more of the beginner level language courses in college than otherwise).</p>
<p>In some areas, Spanish language skills can be maintained or enhanced in general social situations if there are large numbers of native or heritage speakers around.</p>