* Retranslate the complete Japanese online edition from Chinese
* Fit Japanese homepage labels and localize heading permalinks
* Point Japanese contribution instructions to the Japanese preview
* Replace locale conditionals with multilingual UI tables
Replace the exercise pages' Python-only snippets with source-backed implementations for the 13 visible programming languages, and localize reader-facing comments by site language. Zig remains out of scope.
Approval bypass: repository protection requires one approval but does not enforce it for administrators. All 68 completed checks succeeded; four non-required Java jobs remained queued on the existing ubuntu-20.04 workflow, with no failed checks.
