Do i need certified translation for foreign diploma wes evaluation? In most WES cases, yes, if your documents are not in the accepted language. This 2025-2026 guide explains exactly what WES checks, when self-translation is disallowed, why the sealed-envelope rule is often misunderstood, and how to avoid costly delays. You will get a practical compliance checklist, common rejection triggers, and a clear CertOf vs traditional agency comparison on speed, price, and acceptance-focused quality so you can submit once and move forward faster.