Last updated: June 2026
By the time you reach the citizenship application, you have already translated more foreign documents than you ever expected to — for the visa, for the extension, for settlement. So the dread is understandable: do you really have to do it all over again to naturalise? Almost always, no. The naturalisation stage leans heavily on documents the UK itself issued you, most of them already in English, and many of the foreign-language certificates you need were translated years ago and are still perfectly valid. The skill here is knowing the short list of what genuinely needs a certified translation now — and what you can simply reuse.
Usually not. By the naturalisation stage most of your evidence is UK-issued and already in English — your BRP, your settled status, your Life in the UK pass. Only a short list of foreign-language documents needs certified translation now, and translations you obtained for earlier visa stages can often be reused.
Naturalisation (Form AN for adults, or registration on Form MN1 for children) sits at the end of a long road. By the time you apply, the Home Office already holds most of your history, and the bulk of what you submit was generated inside the UK: your biometric residence permit or eVisa, the letter or status confirming your indefinite leave to remain or settled status, your Life in the UK test result, and your English-language qualification. All of that is in English. None of it needs translating.
The foreign-language documents that remain are a short, predictable list — and crucially, you may have already paid to translate them once. A certified translation of your birth certificate done for your original spouse or work visa does not stop being valid just because years have passed. The document hasn't changed, so the translation hasn't either.
So the honest starting point is reassuring: most applicants need little or no new translation at the citizenship stage. The work is not translating everything again — it's identifying the handful of documents that still need it, and gathering the certified translations you already have for the rest.
Any foreign-language document you are relying on that the Home Office hasn't already accepted in English: a marriage certificate (on the route via a British spouse), birth certificates used to prove identity or parentage, divorce decrees from earlier marriages, foreign name-change documents, and overseas police or court records relevant to the good-character requirement.
The test is the same one that runs through every UKVI application: is the document in English, and is it something you are actually relying on? If yes to the first, no translation is needed. If no, it needs a certified English translation before a caseworker can give it any weight.
Marriage certificate. If you are naturalising on the three-year route as the spouse or civil partner of a British citizen, your relationship is part of the assessment, and a foreign-language marriage certificate needs certified translation. If you naturalise on the five-year route as a settled person in your own right, marriage may not be in issue at all.
Birth certificate. Used to confirm identity and, for children's registration, parentage. A foreign-language birth certificate needs a certified translation — though, again, you may already have one from an earlier application.
Divorce decrees and previous-marriage documents. If your marital history matters to the application and those documents are in another language, they need translating.
Name-change documents. If your name differs across your records — a common situation after marriage, or where a country issues a formal change-of-name deed — the foreign-language document that explains the difference needs certified translation. See our guide on when a name is spelled differently across documents (/blog/name-spelled-differently-across-documents).
Good-character evidence. This is the one applicants most often miss. Naturalisation requires good character, and you must disclose overseas matters — convictions, certain civil judgments, and in some cases police certificates. Where those records exist in another language, they need certified translation so they can be properly assessed. Hiding behind an untranslated document is the wrong instinct: an untranslated record carries no weight, but an undisclosed one can sink an application.
Usually yes. UKVI does not put an expiry date on a certified translation of a document that doesn't change, like a birth or marriage certificate. As long as you still have the original certified translation with its statement of accuracy, you can submit it again. You only re-translate if it's lost, non-compliant, or the underlying document was reissued.
This is the single biggest money-saver at the citizenship stage, and the most common thing applicants get wrong — they assume a translation has a shelf life. It doesn't. The Home Office requires certain evidence to be recent (a bank statement, for instance), but a translation simply mirrors the document it came from. Your birth certificate says the same thing it said in 2018, so the 2018 certified translation of it is still accurate and still acceptable.
What makes a reused translation acceptable is that it was properly certified in the first place: an independent qualified translator, a statement of accuracy, and the translator's credentials. If your earlier translation had all of that, keep it with the original and submit it again.
There are three situations where you do need a fresh translation. First, if you've simply lost the certified copy — a translator can re-issue or re-do it. Second, if the original was never compliant: a translation a relative did, or one without a statement of accuracy, was never valid and shouldn't be relied on now. Our guide to why UKVI rejects translations (/blog/top-reasons-ukvi-rejects-translations) covers what a compliant certified translation must contain. Third, if the underlying document itself was reissued or annotated since — a replacement marriage certificate, or a birth certificate with a new marginal note — then the old translation no longer matches the document, and you need a new one.
Registering a child as British (Form MN1) usually needs the child's birth certificate and the parents' documents translated if they're in another language — though many were translated for the child's earlier visa. A typical citizenship-stage translation job is small, often just one or two certificates, commonly £30–£90 with 1–3 working days' turnaround.
Children are registered as British citizens rather than naturalised, on Form MN1, and the translation question is the same: the child's foreign-language birth certificate, and sometimes a parent's documents, need certified translation to establish parentage and the parent's status. As with adults, much of this was often already translated when the child first came to the UK, so check what you have before paying again.
The good-character requirement deserves a second mention because it's where translation is both most overlooked and most consequential. If you have lived in or have records from another country, anything bearing on character — an overseas conviction, certain civil or financial judgments, a foreign police certificate — should be disclosed, and if it's in another language it needs certified translation so it can be read and weighed. The right approach is to translate and disclose, not to stay quiet and hope.
On cost: because the citizenship stage usually involves only a handful of foreign-language documents — and often just one or two — the translation bill is small compared with earlier, document-heavy stages like the spouse or skilled-worker application. A single certificate is commonly £30–£90 at standard UK certified rates, delivered in 1–3 working days, with faster options near a deadline. The expensive version of this stage is the avoidable one: re-translating documents you already hold a valid certified translation of. Check your file first, translate only what's genuinely outstanding, and the final step of your journey to British citizenship is also one of the cheapest.
Almost never. By the naturalisation stage most of your evidence is UK-issued and already in English, and the foreign-language certificates you do need were often translated for an earlier visa. Those certified translations remain valid, so the new translation work is usually small or none.
No. UKVI does not set an expiry date on a certified translation of a document that doesn't change, such as a birth or marriage certificate. As long as you still have the original certified translation with its statement of accuracy, you can submit it again years later.
On the three-year spouse route your relationship is assessed, so a foreign-language marriage certificate needs certified translation, along with any earlier divorce documents if your marital history is relevant. If you naturalise on the five-year route in your own right, marriage may not be in issue at all.
If you are relying on them or disclosing them and they are in another language, yes. The good-character requirement expects you to disclose overseas convictions and certain other matters; an untranslated record can't be assessed, so translate and disclose rather than omitting it.
If you no longer have the certified copy, you'll need a fresh certified translation — a qualified translator can re-issue or redo it. The document itself hasn't changed, so it's a straightforward re-translation rather than anything more involved.
Less than earlier stages, because it usually involves only one or two foreign-language certificates. A single certificate is commonly £30–£90 at standard UK certified rates, delivered in 1–3 working days, with faster options if your submission date is close.
UKVI-accepted certified translations from £12.99 per page. Statement of accuracy included. 24-hour delivery.