You can learn them online. For example, https://eurekly.com offers Filipino, Bengali, Thai, Hindi, Cantonese, Malay and even Sanskrit as well as a wide range of traditionally preferred languages. Knowledge of a rare language is a perfect asset. Make sure you choose such a language that you will be able to find a job with in the region where you live. Otherwise you will spend much effort and money to learn it and will never apply it in your career.