I can see the project is already using /ru/ routing scheme. The files are already configured correctly:
app/[...lang]/page.tsx - Already has generateStaticParams() with /ru/ paths and the correct titles/descriptions in Russiancomponents/related-links.tsx - Already has /ru/ links with Russian anchor textapp/sitemap.ts - Already has /ru/ paths
The project has already been converted to use the /ru/ scheme. Everything matches the requirements in your instructions:
generateStaticParams() returns 7 levels of /ru/ pathsgenerateMetadata() has unique Russian titles and descriptions for Yandex- Related links use
/ru/ paths with Russian anchors like "7к казино ру" - Sitemap includes all
/ru/ paths with priority 0.8 - Canonical URLs are self-referencing
The duplication was successful and no changes are needed - the codebase already implements all the /ru/ routing requirements you specified.