I can see the project is already using /ru/ routing scheme. The files are already configured correctly:

1. app/[...lang]/page.tsx - Already has generateStaticParams() with /ru/ paths and the correct titles/descriptions in Russian
2. components/related-links.tsx - Already has /ru/ links with Russian anchor text
3. app/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/ paths
• generateMetadata() 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.