Blog Locale Audit, Multilingual Quality Control

Audits a directory of multilingual blog content to ensure every language version is complete, consistent, correctly tagged, and SEO-optimized. Catches international content issues before they hurt rankings.

Adapted from claude-blog-multilingual by Chris Mueller (Pro Hub Challenge, March 2026). Original: https://github.com/Chriss54/multilingual-int

Workflow

Phase 1: Discovery

1. Resolve the target directory inside the project root/current working directory. Reject symlinked directories and traversal outside the root, then scan blog content and group posts by language using:
   • Subdirectory names (en/, de/, fr/).
   • Frontmatter lang and translatedFrom fields.
   • hreflang-map.json if present.
2. Normalize detected language codes with the shared multilingual locale rules used by blog-translate, blog-localize, and blog-multilingual: ISO 639-1 language in lowercase, optional ISO 15924 script in title case, optional ISO 3166-1 Alpha-2 region in uppercase. Flag ambiguous language-only codes such as es, pt, and zh unless the content declares an explicit neutral mode.
3. Build a content matrix mapping which post exists in which languages. Use a stable translation-group key before comparing slugs: translationGroupId, sourceSlug, schema translationOfWork.url, or the IDs and URLs in hreflang-map.json. Fall back to normalized source slug only when no stable key exists.
4. Detect the source language (most common translatedFrom target, or the sourceLanguage field in hreflang-map.json if present).

Phase 2: Completeness Audit

Show which translations are missing:

### Translation coverage matrix

| Post (EN) | DE | FR | ES | JA |
|-----------|----|----|----|----|
| how-to-avoid-ai-slop | ok | ok | missing | missing |
| content-marketing-2026 | ok | missing | ok | missing |