What are majors people should take to become a translator? What is the maximum languages one must learn?

Hi! If I were you, I see that you are from Oakland, I would start by taking a look at MIIS (https://www.middlebury.edu/institute/), they have one of the best programs of translation and localization worldwide. You can also attend free meetings from the Northern California Translators Association (ncta.org) which is the local chapter of the American Translators Association (https://www.atanet.org/) to meet professional translators and/or people who want to become translators. They have a lot of free events in San Francisco.

I graduated at the Faculty of Translation and Interpreting from University of Geneva, Switzerland: https://www.unige.ch/fti/en/

Usually to access translation schools you need to already have a good level (reading, writing, understanding) in at least 2 languages, your native and a target language (often schools want you to have 2 target languages). You need to be very good in your native language because that's usually the language in which you will translate as a professional translator. Before going to translation faculty I attended a high school specializing in languages (in Italy): I studied Italian (my native), French, English, German, language and literature. When I finished high school, I was 18, I took the exam to the translation school in Geneva and succeeded. Those were all exams: translation English into Italian, translation French into Italian, grammar exercises in 3 languages, I had to write an essay in Italian. Let me know if you would like to know more details. Hope this helped a little bit.

Great choice  and very interesting.  Start by identifying how many languages you want to learn? What areas do you like, for example healthcare, legal? Although you don't need a BA I do recommend getting one,  perhaps consider a BA in Linguistic or any language you may like.  For example I know English, Spanish and a little bit of French but I want to learn Portuguese .  You can get more information at The American Translators Association.