It is now possible for merchants to automatically redirect visitors to translated storefronts with the Language redirection setting within Markets. Language redirection will detect a visitor’s browser language and automatically switch the storefront to match, when that language is available. For a language to be available to visitors, it has to be added to your store, assigned to relevant markets, have translations added, and be published. For example, if your domain is johns-apparel.ca and your Canada market's default language is English, when language redirection is activated, a visitor from Canada that has their browser’s primary language set to French will automatically be redirected to johns-apparel.ca/fr, where the storefront is in French.
Learn more about Language Redirection in the Shopify Help Center.