The marriage contract ran seven pages, German on the left and English on the right, and it refused to pick a winner: "In case of differences between the German and the English version of this marriage contract, the German version is not supposed to have priority over the English version or vice-versa."
In March 2025 a New York judge never reached the question of what it meant. Neither spouse had filed an English translation with a translator's affidavit, so the court held that the agreement had "no evidentiary value" and disregarded it.
That case, Z.J.V. v. A.A.V., captures both halves of this subject: what courts demand before they will read a contract, and why the language clause matters before anyone signs. Below: court rules in three states, federal costs, arbitration, governing language clauses, the terms that do not travel, a sample translator affirmation and the mistakes that sink exhibits.
Does a foreign-language contract need a certified translation for a US court?
Yes, in practice, and usually more than a simple certificate. There is no single national rule; each court system sets its own, and they are stricter than many litigants expect.
| Court system | Rule | What it requires |
|---|---|---|
| New York state courts | CPLR 2101(b) | An English translation and an affidavit by the translator stating qualifications and that the translation is accurate. CPLR 2106 also allows an affirmation under penalty of perjury in the statutory form. |
| California state courts | Rules of Court, rule 3.1110(g) | In civil law-and-motion matters, an English translation certified under oath by a qualified interpreter. |
| Texas state courts | Rule of Evidence 1009 | The translation, the original and a qualified translator's affidavit or unsworn declaration setting out qualifications, served at least 45 days before trial. Objections are due 15 days before trial. |
New York judges enforce the rule exhibit by exhibit. In P.K. v. M.P. (Supreme Court, Westchester County, April 17, 2025), a divorce court precluded Greek-language exhibits, mostly bank statements, a deed and tax returns, because some had no translation and others came with certificates that were conclusory, not in affidavit form or not notarized. In Matter of S.A.B.G. (2015), a Nassau County court rejected a translator's statement that she was "proficient in both the English and Spanish language" as insufficient to show qualifications. A certification that passes at USCIS can fail in a New York courtroom.
Texas rewards the party that moves first. If a translation is served on time and nobody objects or serves a conflicting translation, Rule 1009(c) says the court must admit it, if the underlying document is otherwise admissible, and may not let a party attack its accuracy. Miss the 45-day window and you lose that shortcut, although the court may alter the deadlines for good cause and a qualified translator can still testify.
Federal courts generally expect English translations of foreign-language exhibits too, under their local rules and judges' orders. For the wider picture, see court translation requirements in the US and translation for civil litigation.
How does arbitration handle contract translations?
Institutional rules give the tribunal control. Under Article 20 of the 2021 ICC Arbitration Rules, if the parties have not agreed on a language, the tribunal decides, "due regard being given to all relevant circumstances, including the language of the contract." Under Article 19(2) of the UNCITRAL Arbitration Rules, the tribunal may order that documents and exhibits submitted in their original language be accompanied by a translation into the language of the arbitration.
The IBA Rules on the Taking of Evidence (2020), which many tribunals adopt or use as guidance, split the job. Documents submitted to the tribunal in another language "shall be accompanied by translations marked as such," while documents produced in response to a request to produce "need not be translated," unless the parties or tribunal decide otherwise.
The practical effect: in an arbitration seated in New York over a Brazilian supply contract, you translate the contract and the documents you rely on, and you should expect the other side to contest your rendering of the one word that carries the case.
What is a governing language clause, and why does it matter?
It is the term that says which language version controls if the texts differ. Cross-border contracts typically handle language in one of three ways:
Single-language contract with a convenience translation. One version is signed; the translation is for information. A typical clause: "This Agreement is executed in English. Any translation is provided for convenience only, and in the event of any inconsistency, the English version shall prevail."
Bilingual contract with a prevailing language. Both versions are signed, often side by side, and one prevails. Both columns must still match, because a party who relied on the weaker column may argue misunderstanding.
Bilingual contract with equal authenticity. Both versions bind equally, which turns every discrepancy into a dispute about intent. That was the Z.J.V. clause.
A bilingual contract does not make its English column a court-ready translation. The Z.J.V. court held that CPLR 2101(b) applies "even in the instance, such as this, when a document contains text in both the English language and in a non-English language." If a bilingual contract may ever be litigated, have both columns checked before signing and budget for a proper translation later.
Real estate and employment contracts
Real estate. Purchase agreements for property abroad turn up in US mortgage files when sale proceeds fund a down payment, and in divorce and probate when foreign property is divided. Recording is stricter: California Government Code 27293 bars a county recorder from accepting a non-English instrument unless it comes with a translation by a certified or registered court interpreter or an accredited translator registered with the American Translators Association, plus a notarized declaration of accuracy that the county clerk verifies and certifies.
Employment. Foreign employment contracts support L-1 and employment-based immigration files as proof of title, dates and duties, and they surface in US disputes involving staff hired abroad. For immigration use, see employment letters and pay stubs.
Which contract terms are hardest to translate?
The hard part of legal translation is not vocabulary. It is recognizing when a term in one legal system has no twin in the other.
- Consideration. A common-law requirement for a binding promise with no exact civil-law counterpart; a translation into Spanish or German conveys the function rather than forcing a false equivalent.
- Penalty clauses. German law has the Vertragsstrafe, a sum of money promised as a penalty for non-performance (BGB section 339), and Spanish law the cláusula penal, which replaces damages unless agreed otherwise (Civil Code article 1152). US law treats penalties with suspicion: under UCC 2-718, "a term fixing unreasonably large liquidated damages is void as a penalty." Rendering cláusula penal as "liquidated damages" makes a legal argument the original did not make, so the faithful choice is "penalty clause" with the original term in brackets.
- "Indemnify and hold harmless," "best efforts," "time is of the essence." Each carries US case law; abroad, they need phrasing that keeps the obligation without importing foreign meaning.
- Notarial instruments. A Spanish or Latin American escritura pública is a public deed executed before a notary, far more than a US notarized signature; "notarized document" understates it.
- Company seals. Chinese companies sign contracts with official seals, so every seal and its legend is described in brackets, for example [round red seal: Shenzhen XX Trading Co., Ltd., contract seal].
- Modal verbs. "Shall," "will," "may" and "must" are not interchangeable. A translation that turns an obligation into a permission changes the deal.
Sample translator affirmation for a New York court
CPLR 2101(b) needs the translator's qualifications and a statement of accuracy; CPLR 2106 supplies the affirmation wording, which replaces a notary. A typical form:
Other states use their own forms, and some courts still want a notarized affidavit; a notarized translation covers those.
Checklist for a court-ready contract translation
Common mistakes
Translating only the clauses in dispute. Opposing counsel will argue context, and the judge needs it.
Relying on the other side's translation. Fine for convenience, risky as evidence. In Texas, failing to object or serve your own version in time can lock their translation in.
Missing deadlines. A Texas translation served late loses Rule 1009's automatic path to admission.
Wrong statement format. A USCIS-style certification filed in New York, where the court expects an affidavit or affirmation stating qualifications.
Machine translation. Free tools routinely turn obligations into options and drop negations. Output like that has no place in a document anyone will sign or file.
Questions people ask
Does a foreign-language contract need a certified translation for a US court?
Yes, in practice. Courts expect an English translation with a statement from the translator, and many require it to be sworn and to state the translator's qualifications, as New York's CPLR 2101(b) does. Check the specific court's rules before ordering.
What is a governing language clause?
It is a contract term that says which language version controls if the versions differ. Without one, or with equally authentic versions, any discrepancy can become a dispute over what the parties intended.
Can a bilingual contract be filed in court without a separate translation?
Not safely in New York. In a 2025 Westchester County case, a German and English marriage contract was given no evidentiary value because no translation with a translator's affidavit was filed, even though the English text was printed beside the German.
Can I recover document translation costs if I win in federal court?
Generally not as taxable costs under 28 U.S.C. 1920(6). In Taniguchi v. Kan Pacific Saipan (2012), the Supreme Court held that compensation of interpreters covers oral interpretation, not document translation. A fee-shifting clause in the contract or another statute may still apply.
Should a contract translation be notarized?
Only if the forum or recipient requires a sworn statement. Notarization confirms the translator's identity and oath, not the translation's accuracy, and New York now accepts an affirmation under CPLR 2106 while Texas accepts an unsworn declaration under Rule 1009.
Who should translate a contract going to arbitration?
A professional legal translator independent of the parties, whose work can withstand challenge. Tribunals may order translations under rules such as UNCITRAL Article 19(2), and the opposing side can contest key terms, so accuracy and a clear certification matter as much as in court.
How long does a contract translation take and what does it cost?
Official Translations charges $29.95 per page for a certified translation, and short agreements of a few pages are usually delivered within one to three business days. Long contracts with annexes take longer, so plan court deadlines, such as the 45-day rule in Texas, backward from the filing date.