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In American (US) English, "curso" translates as "program" (not "course"). A "course" is a single class. Here it refers to a program of study, in other words, several courses put together leading to a degree. I answered a related question:

diretor de curso de universidade: program director
https://www.proz.com/kudoz/portuguese-to-english/education-p...

"Faculty" could mean both "a branch of teaching or learning in an educational institution" and "the faculty members". To avoid ambiguity, it seems to me that "college" is a better translation for "faculdade".

college: an independent institution of higher learning offering a course of general studies leading to a bachelor's degree. Ex. a liberal arts college; a part of a university offering a specialized group of courses
the university's college of pharmacy. Ex.: the university's college of pharmacy
https://www.merriam-webster.com/dictionary/college

faculdade: estabelecimento de ensino superior
https://www.aulete.com.br/faculdade

NB: A "curso de Letras" does not necessarily cover other languages and kinds of literature. It could be limited to Portuguese-only:

"As matérias da faculdade de Letras estão voltadas à análise da estrutura linguística e da literatura. Por isso, as disciplinas abordam temas diversos — como a história da língua, sua evolução gramatical, suas correntes literárias, entre outros.

Logo, no curso de Letras Português/Literatura são estudadas, por exemplo, as disciplinas Língua Portuguesa, Teoria da Literatura e Literatura de Língua Portuguesa. No curso de Letras Português/Inglês, por sua vez, são estudadas também as disciplinas Língua Inglesa e Literatura de Língua Inglesa." https://www.unigran.br/novidades/faculdade-de-letras-entenda...

I would definitely avoid the temptation of adding extraneous information that is not in the source text! Additions are considered "errors" on the ATA/Abrates accreditation exams: https://www.atanet.org/certification/how-the-exam-is-graded/... (Sorry I couldn't find the Abrates link.)

Please note:
A "program" and a "major" are not synonymous. "Program" translates as "curso" and "major" as "área de especialização" as opposed to "minor" (área de especialização secundária) into PT-Br.


Example Sentences

College of Letters and Science is an alternate name for College of Arts and Sciences at various universities. Institutions known as a College of Letters and Science...
https://en.wikipedia.org/wiki/College_of_Letters_and_Science

The University Medallist Sub-Committee reviewed the nomination packets of and interviewed 8 finalists on May 9, 2008. The group decided upon Matthew Holden in the Applied Mathematics program of Letters and Science as the 2007-2008 University Medal recipient. https://academicsenate.ucdavis.edu/sites/g/files/dgvnsk3876/...

PS: If for some reason I don't respond to comments and/or disagrees, it's either because I'm too busy or simply chose not to address any negative/disagreeing comments that I've been getting for no apparent reason. My refusal to engage with whoever thumbs me down doesn't mean that I agree with them. Asker, please feel free to message me (via inbox) if you need any clarification about my answer. Thank you.

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Note added at 2 hrs (2021-12-24 16:30:04 GMT)
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major: área principal de especialização da graduação https://www.estudarfora.org.br/quer-graduar-se-em-danca-e-bi...

program (PT-Br: "curso"): curriculum; the courses offered by an educational institution
https://www.merriam-webster.com/dictionary/program
https://www.merriam-webster.com/dictionary/curriculum

(Foreign) Language and Literature Faculty of Language (Institution)