Sprwt's storefront is single-language per site — there is no built-in mechanism to serve two full language versions of the same site. You can translate all fixed wording into your language with Custom Texts (and write your pages, meals and emails in that language), which is how non-English sites are set up. For visitors who want a second language on top of that, there is a Google Translate integration (Business > Integrations, tile Google Translate, with settings Show Google Translate on Header Bar, Google Translate Filter Countries Available and Google Translate - Language ISO2) that adds an automatic-translation selector to the site. See the help article for the recommended approach.