You woukd have to study foreign languages. It ultimately depends on what language you woukd want to be a translator for. For example: if you were to want to be a translator for Spanish, then you would have to study Spanish. If you wantes to translate German, you would have to study German etc. Because you already know your main language you woukd only have to study one or more languages depending on what exactly you want to be a translator for. Generally there are four types of classes for Spanish. Spanish 1, 2, 3, 4. Ultimately there may be more. Learning languages may take up to a few years.