One source of confusion: the same documents have different names in different countries and languages. Knowing the correct terminology helps you identify which documents you have, which you need, and what to tell your translator.
Mexico: The transcript equivalent is called "kardex," "historial académico," or "certificado de estudios." The diploma equivalent is the "título profesional." Mexico also issues a "cédula profesional" (professional license) which is a separate document. WES typically requires the certificado de estudios and título.
Colombia: The transcript is called "certificado de notas," "registro académico," or "sabana de notas." The diploma is called "diploma" or "acta de grado" (graduation certificate). Note that the "diploma" and "acta de grado" are sometimes considered separate documents in Colombia — check with WES if both are needed.
Argentina: The transcript is the "certificado analítico" or "analítico." The diploma is the "título" or "diploma." Argentina also issues a "certificado de título en trámite" (certificate of degree in process) for recent graduates waiting for the official diploma.
Spain: The transcript is the "expediente académico" or "certificación académica personal." The diploma is the "título universitario" or "título de grado/máster/doctor." Post-Bologna degrees may also come with a "Suplemento Europeo al Título" (European Diploma Supplement), which WES may require.
China: The transcript is the "成绩单" (chéngjì dān). China issues two separate "diploma" documents — a "学位证书" (degree certificate) and a "毕业证书" (graduation certificate). WES requires all three documents translated.
Russia/Ukraine: The transcript is called "приложение к диплому" (diploma supplement) in Russia or "додаток до диплому" in Ukraine. The diploma itself is "диплом" in both languages. Soviet-era documents may use different formatting. WES typically needs both the diploma and the supplement.
France: The transcript is the "relevé de notes." The diploma is the "diplôme" (formal certificate). Post-Bologna degrees may include an "annexe descriptive" (diploma supplement) equivalent to the European Diploma Supplement.