Look up the meaning of words in this updated, online version of the Oxford English Dictionary. It's particularly useful when researching the etymology of a word. (Oxford)
These are books about the process of translation. For others, look up Translating
and interpreting in the Subject Heading Browse search mode.
These databases or websites will help you discover what texts have been translated. Idex Translatioum was created by UNESCO to encourage cultural exchange through translation.You can find translations from a particular language in Book Review Digest by using the name of the language and the word "translations" in your subject search. For Worldcat, use the same strategy, but add the target language (e.g. English) to your search terms.
Search a catalog of library holdings from around the world. Find which libraries have copies of a certain book, DVD, or other material. The FirstSearch interface was designed more with librarians in mind. (OCLC)