The auto-generated en.d.json.ts was stale (missing beszel keys), causing 67 TS2345 errors. Additionally, with ~2,367 leaf keys at depth 10, the generated declaration triggers TS type complexity limits (known next-intl issue #2296). Disable the feature in next.config.ts, delete the stale file, and remove its .gitignore entry. Key/namespace validation is preserved via raw JSON import types.