A store can have up to five extra domains, one per market, for example yourbrand.fr for France and yourbrand.co.uk for the UK.
- Open your store, then Settings › Domain and email, and find More domains, one per market.
- Type the domain, pick the language it shows the store in and the currency it opens in, and add it.
- Point it to the address shown, the same way as your main domain, then choose Check.
The domain is secured with HTTPS by itself and starts serving once it points here. Shoppers can still change language and currency on the store.
Languages come from Settings › Languages: see Show your store in more languages.