Arabic is the UAE's official language. Communication shouldn't be a problem because the majority of people speak English fluently. Private institutions typically teach in English, but if you choose one of the UAE's public universities, you will need to be fluent in both Arabic and English. If English or Arabic is not your first language, you must show proof of your ability in order to enrol in classes. Learning a little Arabic would be beneficial for your daily life even if you study in English. It would be ideal to practise speaking with locals and other students. Arabic is a widely used business language, and having another language would look fantastic on your CV or resume.