This is, hands down, the question we get asked most often, usually by someone staring at an admissions checklist or an embassy requirements page that just says “translated documents required” without saying which kind. Here’s the short answer, and then the longer one that actually explains why it matters.

The short answer

A certified translation comes with a signed statement from the translator or agency confirming it’s a complete and accurate translation of the original. It’s the standard used across most of the English-speaking world : the US, the UK, Canada, and most international institutions.

A sworn translation is done by a translator who has been officially authorized by a court or a government body in a specific country to produce legally binding translations sometimes called a “sworn translator,” “certified public translator,” or “traducteur assermenté” depending on the country. This status doesn’t exist everywhere; it’s a specific legal category in civil-law countries like France, Belgium, Spain, or Poland.

In other words: every sworn translation is certified, in the everyday sense of the word. But not every certified translation is “sworn,” because sworn status is a legal designation tied to a specific jurisdiction.

Why this trips people up

If you’re applying to a university in Belgium or Poland, the admissions office may specifically ask for a translation by a “sworn translator” (or the local equivalent), because that’s the standard their legal system recognizes. Show up with a certified-but-not-sworn translation, and it might bounce back: not because the translation is wrong, but because it doesn’t carry the specific legal weight their system requires.

If you’re applying to a university in Canada or dealing with a UK visa, “certified” is generally the standard they expect, and “sworn” isn’t a category their system uses at all.

This is why the safest move is never to assume, it’s to check the exact wording on the requirements page of the specific institution or embassy you’re dealing with, and to ask your translation provider directly: “Does this document need to come from a sworn translator recognized in [destination country], or is a standard certified translation sufficient?”

What a good agency should do for you

A translation provider that only knows how to produce one type of document is going to give you the same answer regardless of what you actually need. What you want is an agency that asks where the document is going before it asks what language pair you need, because the destination determines the standard, not the other way around.

At Ngaija, our Translation & Interpretation Unit handles both certified and sworn-equivalent translations across our language pairs (English, French, Spanish, German, Chinese, Arabic), and every document : regardless of which standard it needs to meet, passes through dual verification before it’s stamped. If you’re not sure which category your paperwork falls into, that’s a five-minute conversation, not a guessing game. See our full process on the language services page, or read our broader guide on what to check before choosing a translation agency in Kigali.

The one thing to do before you order anything

Find the exact requirement wording from the institution receiving your document. If it says “certified,” a certified translation from a credible agency will almost always work. If it says “sworn,” “legalized,” or names a specific national register of translators, that’s a signal to ask your provider directly whether they can meet that exact standard, or to ask us before you pay for anything.