A localized checkout is built for the buyer's country rather than the seller's: their language, their currency, the payment methods they actually use, and the address, tax and receipt conventions their market expects. It separates a store that accepts orders from a country from one that sells into it.
Method coverage decides more than translation
Cards are the default assumption of most Western-built stores and a minority method across much of the world. Bank transfer schemes, wallets and local instant-payment rails carry the majority of e-commerce volume in several large markets, and a buyer who cannot see the method they use does not switch to a card. They leave.
Presenting the right alternative payment method per country, ordered by local share, moves more revenue than any layout change. Showing twenty options everywhere is its own failure: paralysis at the last screen.
The details that give a foreign seller away
Address forms demanding a state where none exists, or placing the postal code after the city in a market that writes it first. Phone validation rejecting a valid local number. Tax shown exclusive of VAT to a consumer who expects the price to be final. One untranslated error message on an otherwise translated page.
Each of these says the store was not built for this buyer, and they land precisely when the buyer is deciding whether the seller is real.
Pricing locally while settling elsewhere
Quoting in local currency means somebody carries the FX exposure. The simple route is to price locally and let the provider convert into the merchant's settlement currency at a spread. The cheaper route at volume is to hold local balances and repatriate on a schedule the merchant chooses.
Avoid pushing the conversion onto the shopper at the moment of payment. Dynamic currency conversion produces a worse rate for the buyer and a complaint for the merchant.
Consumer law arrives with the buyer
Distance-selling rules, withdrawal periods, pre-contract disclosure and invoicing formats are set by the buyer's jurisdiction, not the seller's. Strong customer authentication applies to European cardholders wherever the store sits, which changes what the payment step looks like and where an SCA exemption can be claimed. Tax registration thresholds follow the same logic, and crossing one quietly costs more than a bad address form.
Choosing which markets to localize first
Rank by traffic already arriving from a country against how badly that country converts. A market sending real volume at half the site median repays the work; a market sending fifty sessions a month does not, whatever its addressable size.
Do one country at a time and read the result per country, since a blended conversion rate will absorb the improvement and tell you nothing.