The Heilbrun Music and Media Library maintains a collection of bilingual dictionaries for languages frequently encountered by music researchers. Look for them in the Reference section under call numbers beginning with P.
Woodruff Library maintains a large collection of dictionaries for many languages in the Reference Section on the entry level and in the stacks.
Sample catalog searches for dictionaries:
This Subject search: SPANISH LANGUAGE DICTIONARIES—ENGLISH
will find Spanish-English dictionaries.
This Subject search: SPANISH LANGUAGE DICTIONARIES
will find Spanish–Spanish dictionaries.