Customs and Border Protection doesn't require you to be bi-lingual when hired. However, according to their website, 'you must learn Spanish while at the Border Patrol Academy, and you must pass a series of Spanish tests after entering on duty to continue in the Border Patrol.' If you have additional language skills, make sure to include details on your resume. You can keep your answer brief and be sure to rate your skill level in each language, as beginner, conversational, or fluent. Also, remember to express your enthusiasm and willingness to learn Spanish if you don't yet possess this skill.