[EN] Can you use an English SaaS contract with a French customer?

An English-language SaaS contract is enforceable with a French customer, and it's the default choice for B2B software deals signed in France in 2026. The catch sits in two places: Loi Toubon can force a French version for individual consumers, and mandatory French Commercial Code rules apply no matter what language sits on the page.

Why this matters

Every SaaS founder closing a first French logo asks the same question before signing: does the English master service agreement actually hold up. Get it wrong on a B2C product and the contract is exposed on a technicality that has nothing to do with the deal terms. Get it wrong on a B2B deal and the risk is smaller, but a dispute in a French court still runs slower and costs more when the only version on file is in English. Lina reviews SaaS contracts for exactly this gap between what founders assume and what French law actually requires.

For an English SaaS contract, France draws one hard line: who the customer is. A French enterprise buyer signing a multi-year subscription is a different legal animal from a French consumer clicking "I agree" on a freemium checkout page, and the language rules treat them differently.

Can you use an English SaaS contract with a French customer?

Yes for business customers, no as the sole version for consumers. The table below breaks down what changes by customer type.

B2B SaaS contracts: English works, with limits

French law does not require commercial contracts between two businesses to be drafted in French. French courts, including the Cour de cassation, have repeatedly upheld English-language B2B contracts where both parties negotiated the terms and clearly understood them at signature. That's the standard shape of a SaaS agreement between a vendor and a French corporate customer in 2026.

The limits sit around three things:

• Data protection annexes. If the SaaS product processes personal data, GDPR compliance work doesn't require French, but French data controllers often ask for a French-language data processing agreement for their internal compliance file, even when the master agreement stays in English.
• Employment-adjacent clauses. Anything that touches a French employee directly — a secondment clause, a non-solicit tied to named staff — sits closer to labor law, where French-language requirements are stricter than for a pure commercial contract.
• Public procurement. A French public body buying SaaS almost always requires French, regardless of contract size.

Outside those three cases, an English SaaS contract signed with a French business customer stands. The commercial terms — pricing structure, SLAs, liability caps — don't need translation to be binding.

B2C SaaS contracts: French language rules kick in

Once the customer is an individual buying for personal use, Loi Toubon and the Code de la consommation both apply. Loi Toubon, in force since 1994, requires that goods and services offered to consumers in France — including software subscriptions — come with instructions, terms and warranty information in French. Article L. 111-1 of the Code de la consommation adds a separate duty: pre-contractual information has to be given in a way the consumer can genuinely understand, which in practice means French.

This hits three touchpoints on a consumer-facing SaaS product:

• The terms of service and privacy policy shown at checkout.
• Billing communications, invoices and cancellation notices.
• In-app subscription language for any tier sold directly to individuals in France.

A SaaS company running a bilingual checkout — English for enterprise sales, French for self-serve consumer plans — is the practical fix most founders land on rather than translating the entire commercial contract.

Governing law, jurisdiction and mandatory French clauses

An English-language contract doesn't select the law that governs it — that's a separate clause, and a missing one is a common gap in templates pulled from a US or UK SaaS playbook. Without an explicit governing-law clause, a French court hearing a dispute involving a French customer will often apply French law by default, whatever language the contract is written in.

A few French rules apply regardless of the governing-law clause when performance happens in France:

• Payment deadlines. Article L441-10 of the Commercial Code caps standard B2B payment terms at 60 days from the invoice date, or 45 days end of month — a limit that overrides a longer period written into an English contract with a French-based customer.
• Unfair terms. Article L442-1 of the Commercial Code voids certain clauses — disproportionate penalties, sudden unjustified termination — even when the contract is governed by foreign law, if the imbalance is severe enough.
• Consumer jurisdiction. For B2C sales, EU rules generally let the consumer sue in their own country regardless of what the jurisdiction clause says.

This is where a commercial contract drafted for a US market and reused for a French customer creates exposure that has nothing to do with the language it's written in — it's the missing or mismatched clause underneath it. Lina's senior lawyers review SaaS agreements for exactly this kind of gap, with scope and a fixed fee agreed before drafting starts, and a lawyer response typically within 30 minutes of a request.

Why enforceability varies

Whether an English SaaS contract holds up with a specific French customer depends on a short list of factors:

• Customer type — Loi Toubon targets consumer protection, not B2B deal-making, so B2B contracts get far more latitude.
• Where the contract is performed — a SaaS product used and paid for entirely in France draws more French law than one billed from a foreign entity.
• Which entity signs — a French subsidiary signing the contract pulls in more French formalities than a foreign parent company contracting directly.
• Whether the sale is public-facing — a checkout page, app store listing or marketing site aimed at French consumers triggers Loi Toubon even if the back-end contract is B2B-style.
• The governing-law and jurisdiction clauses — a contract silent on these leaves the outcome to whichever court hears the dispute first.
• Sector — regulated sectors like fintech and healthtech often carry additional French-language disclosure duties layered on top of the general rules.

Is an English-language contract legally binding in France?

Yes, an English-language contract is legally binding in France for two businesses that negotiated and understood the terms — French courts have upheld this position consistently. The risk isn't validity, it's evidentiary: in a dispute, the court can require a certified French translation before ruling, which adds cost and time to the process.

Do I need a French version of my SaaS terms of service?

You need a French version once you sell to individual consumers in France, under Loi Toubon and the Code de la consommation. For a B2B-only SaaS product sold through negotiated contracts, a French version isn't legally mandatory, but it shortens the sales cycle and removes a point of friction procurement teams often raise.

What happens if a dispute goes to a French court and the contract is only in English?

A French court can order a certified translation of the English contract before hearing the case, which adds delay and cost to the dispute. Technical terms — SLA definitions, liability caps, IP ownership language — are where translation disputes most often surface, since a literal French rendering can shift the meaning of a carefully negotiated English clause.

FAQ

One last thing

Most founders overcorrect and either translate the entire contract into French or ignore the issue completely — neither is the efficient move in 2026. The cheapest fix, used across most SaaS deals reviewed for French customers, is a one-page bilingual summary plus a prevailing-language clause in the master agreement: it satisfies a procurement team's comfort with French, keeps the English version as the operative legal text for B2B deals, and costs a fraction of a full translation.

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