Email localization: one campaign, every market.
Email localization is adapting one campaign for each market it goes to, not only translating it. Besides the copy, a market's edition can need its own prices and currency format, legal line, products, links, send time and reviewer. The main decision is whether to send one email with language variants or a separate edition per market.
Should each market get its own email, or one email with language variants?
Use language variants when markets differ only in language. Use a separate edition per market when prices, products, offers, legal lines or send dates differ, because a price and its currency format can't be translated. Many brands mix the two: one edition per currency, with language variants inside it.
| Translation only | Language variants in one campaign | One edition per market | |
|---|---|---|---|
| What changes per market | The words | The words, plus any blocks set to vary by language | Everything that differs: copy, prices, products, legal line, links, send time |
| Who reviews | A translator | A translator, sometimes a market reviewer | Someone who knows the market, for each edition |
| Where it breaks | Prices, currency formats and legal lines stay as in the master | Markets that share a language but not prices or legal requirements, such as Germany and Austria, or Sweden and Swedish-speaking Finland | More campaigns to build, check and schedule |
| When it is enough | Same offer, same prices, one legal entity | Same offer and prices; the difference is language only | Different prices, ranges, offers, legal lines or send dates |
A useful test is to take the master email and mark every line that holds a number, a date, a product or a legal sentence. If those lines are the same in every market, language variants will do. If any of them differ, that market needs its own edition.
How is email localization different from translation?
Translation changes the words; localization changes whatever a reader in that market needs to be different. A translated email can be fluent and still be wrong: it shows a Danish price to a Swedish reader, links to the wrong storefront, or carries the legal line of another market.
This guide calls the whole job multi-market email: one campaign, planned once, that reaches several markets as editions that are each right for their market. Multi-market email has three parts. The first is the master: the idea, the offer and the structure, agreed once. The second is the edition: the master adapted for one market, with its language, prices, products, links and legal line. The third is the review: a person who knows the market reads the edition and approves it.
Translation is one step inside the edition. It is often not the slowest step. In multi-market email the time usually goes on the parts that are not words: checking that each product is sold in the market, that each price is right, and that each legal line is current.
What changes in each market?
Nine things can change from one market to the next, and each needs its own check. Not every campaign changes all nine, but a reviewer should look at each one in every edition.
| Element | What changes | What to check |
|---|---|---|
| Language | Subject, preheader, body, buttons, alt text, text inside images | Written or reviewed by someone who knows the market; longer words still fit the buttons |
| Prices and currency format | Currency, symbol position, decimal separator, spacing | Each price is the market's own price, shown as that market writes it |
| Price reductions | The prior price shown next to a reduced price | The prior price is the lowest price of the 30 days before the reduction [1] |
| Offer | Discount, dates, conditions, excluded products | The offer runs in this market, on these dates, in this time zone |
| Product range and stock | Which products are sold and in stock | Every product shown can be bought in this market |
| Legal lines | Sender identification, company details, required notices | The legal line your counsel approved for this market is present and current |
| Links and UTMs | Storefront path or domain, country segment in UTM tags | Every link goes to this market's storefront and carries this market's tags |
| Dates and send time | Date format, local holidays, time zone | The send date avoids local holidays and the send time is set in the market's time zone |
| Tone and forms of address | Formal or informal address, the brand's own word list | The edition follows the brand's rule for this market |
The full list of checks, one block per market, is in the multi-market email QA checklist.
What does one campaign look like in three markets?
One campaign in three markets is three editions that share an idea and differ in the details. The example below is a harvest launch for Holm Coffee, sent to Denmark, Sweden and Germany. Holm Coffee is a fictional demo brand.
| Market | Headline | Currency | Links | Legal line |
|---|---|---|---|---|
| DK · da | Guji-høsten er landet. | DKK, written kr after the amount | /dk storefront | Holm Coffee ApS · Jægersborggade 12 · 2200 København N |
| SE · sv | Guji-skörden är här. | SEK, written kr after the amount | /se storefront | Held: waiting for counsel to confirm |
| DE · de | Die Guji-Ernte ist da. | EUR, written € after the amount | /de storefront | Holm Coffee ApS · Impressum auf holm.example/de/impressum |
Three details carry the lesson. The Danish and Swedish editions both write "kr", but the amounts are in different currencies, so a translated Danish price would be wrong in Sweden. The German edition follows the brand's rule to address readers with "du", not "Sie", which a literal translation would not know. The Swedish legal line is not confirmed yet, so the Swedish edition waits; it does not go out with a guessed line.
Who should review each market's email?
Each edition should be reviewed by a named person who knows the market: a native speaker who also knows the local offer, prices and customers. Language review and market review are often the same person, but they are two different checks.
The language check asks whether the copy reads as if it was written in that language, in the brand's voice. The market check asks whether the offer, prices, products, links and legal line are right for that market. A translator can do the first. Only someone who works with the market can do the second.
Three rules keep review from becoming the bottleneck:
- Name the reviewer for each market in the brief, before the copy is written.
- Send the reviewer the edition and the master side by side, so changes are easy to see.
- Treat any change after approval as a new version that needs approval again.
Which EU rules apply to every market's email?
A few EU-level rules apply in every EU market; each country adds rules of its own on top. This section is not legal advice: have counsel confirm the rules for each market you send to.
- Consent. Marketing email to individuals needs their prior consent [3]. There is a narrower exception for existing customers, for the sender's own similar products, when they could object at collection and can object in each message [3].
- The right to stop. Every marketing email needs a valid address where the recipient can ask for the messages to stop, and must not hide who sent it [3]. A person can object to direct marketing at any time [4], and withdrawing consent must be as easy as giving it [4].
- Prior price. An announced price reduction must show the prior price: the lowest price the trader applied in a period of at least 30 days before the reduction [1] [2]. Member States may set different rules for some cases, such as perishable goods, so check each market.
Phrase the per-market legal checks as questions for counsel: is the legal line counsel approved for this market present, and is it current. Don't copy another market's line and adjust it.
How do Klaviyo and Braze handle several languages?
Klaviyo and Braze can both send one campaign in several languages, chosen by each profile's language. Both are built around language, not market, so prices, offers and legal lines that differ by market still need their own setup.
Klaviyo's Smart Translations translates a campaign into the languages you pick, and profiles with no known language get the default [5]. Braze uses locales: copy is wrapped in translation tags and you supply the translations by file upload or API [6]. The details are on the Klaviyo multi-language guide and the Braze multi-language guide. Other ESPs, including Salesforce Marketing Cloud, Voyado, Customer.io and Iterable, have their own approaches.
A common pattern is language variants inside one campaign per currency, and a separate campaign for any market with its own legal line or send date.
What workflow suits a team of one, or a full team?
Even a team of one can run multi-market email with one brief, one master and one checklist per edition. The steps below keep the work in that order.
- Write one brief. State the idea, the offer (or "no offer"), the markets, the send window with time zones, and a named approver per market. The email brief template has a section per market.
- Decide the shape. Use the decision table above: language variants, editions, or editions per currency with variants inside.
- Build the master once. Agree structure, images and copy in one language before any market work starts.
- Make each edition. Change language, prices, products, links, legal line and send time, and nothing else.
- Review per market. Each named reviewer reads the edition against the master and approves it.
- Check each edition. Run the QA checklist once per campaign, then once per market.
- Load and schedule in the ESP. Test-send each edition to real inboxes, then schedule each one in its market's time zone.
Keep a short log of what went wrong in each market. After a few campaigns it shows which checks matter most for your brand.
Where Caliber fits
Caliber is being built for multi-market email. One approved brief will become an edition per market, checked against the brand's own guide, with each market's prices, links and legal line. Each edition will arrive in your ESP as a draft. Integrations: Klaviyo, Braze, Salesforce Marketing Cloud Next, Voyado, Customer.io and Iterable.
Questions
What is multi-market email?
Multi-market email is one campaign sent to several markets as editions, each right for its market. The editions share an idea, an offer structure and a design. They can differ in language, prices and currency format, products, links, legal line, send time and tone. Each edition is reviewed by someone who knows that market before it is scheduled.
Do I need a native speaker to review localized emails?
Yes, for anything a customer will read. A native speaker catches what a fluent non-native reader misses: tone, the wrong form of address, a phrase that reads as translated. The reviewer should also know the market, so they can check the offer, prices and products. Name one reviewer per market in the brief.
Is machine translation good enough for marketing email?
Machine translation is a usable first draft, not a finished edition. It translates words but does not know your brand's voice, your word list or your rule for formal or informal address. It also leaves prices, links and legal lines as they were in the master. A person who knows the market should review every machine-translated edition.
Are we legally required to email customers in their local language?
It depends on the country and on the kind of message. The EU rules cited in this guide on consent, unsubscribing and prior prices do not set a language for marketing email; national rules can. Ask counsel for each market you send to. This guide is not legal advice.
How long does it take to localize a campaign into 10 markets?
The time depends less on the number of languages than on how many editions really differ. Ten markets with the same prices and offer can share one campaign with language variants. Ten markets with different prices, products and legal lines are ten editions, each with its own review and checks. Count editions, not languages, when you plan.
Can Germany and Austria share one German email?
Only if everything except the language is the same. Germany and Austria share a language, but prices, offers, product range and legal requirements can differ. If any of them differ, make two editions, or use one edition with market-specific blocks, and have each reviewed by someone who knows that market.
Sources
- European Parliament and Council, "Directive (EU) 2019/2161 … as regards the better enforcement and modernisation of Union consumer protection rules", 27 Nov 2019, Article 2 (inserting Article 6a into Directive 98/6/EC). https://eur-lex.europa.eu/eli/dir/2019/2161/oj (checked 1 Nov 2026)
- Your Europe (European Union), "Unfair pricing", last checked by the publisher 30 Apr 2026. https://europa.eu/youreurope/citizens/consumers/unfair-treatment/unfair-pricing/index_en.htm (checked 1 Nov 2026)
- European Parliament and Council, "Directive 2002/58/EC on privacy and electronic communications", 12 Jul 2002, Article 13(1), (2) and (4), as amended. https://eur-lex.europa.eu/eli/dir/2002/58/oj (checked 1 Nov 2026)
- European Parliament and Council, "Regulation (EU) 2016/679 (General Data Protection Regulation)", 27 Apr 2016, Articles 7(3) and 21(2)–(3). https://eur-lex.europa.eu/eli/reg/2016/679/oj (checked 1 Nov 2026)
- Klaviyo Help Center, "How to create a multilingual email campaign using Smart Translations", updated 19 Feb 2026. https://help.klaviyo.com/hc/en-us/articles/38069585109787 (checked 1 Nov 2026)
- Braze Docs, "Multi-language messages". https://www.braze.com/docs/user_guide/message_building_by_channel/email/using_locales/ (checked 1 Nov 2026)