Ah, fixed by adding to svelte.config.js prerender : { crawl : true, entries: [ '/' , '/en' ] } :)

Great job! I just have issue with prerender. I try prerender home page and I get: Error : The following routes were marked as prerenderable, but were not prerendered because they were not found while crawling your app: - / [[lang = langCode]] Seems like crawler whats to start from root path and there is only +error and +layout files 🤔