Usually, English titles are capitalized following the "title style" or the "headline style", meaning that all major words are capitalized: Zotero: A Guide for Librarians, Researchers, and Educators. In French, German, Spanish or other languages, the capitalization rules are different. Most styles adapt the capitalization to the language of the reference, provided you fill in the "language" field of the reference: fre, ger, spa...
