i18n: add full translations for 13 locales (v1.0.10)

- Regenerated wp-bootstrap.pot with updated extractable strings
- Translated 13 locales: de_CH, de_CH_informal, de_DE, de_DE_informal,
  en_GB, es_ES, fr_CH, fr_FR, it_CH, it_IT, nl_NL, pl_PL, pt_PT
- German variants: Swiss (ss) vs Standard (ß), formal (Sie) vs informal (du)
- All 359 translatable strings covered per locale
- Documented fast translation workflow in CLAUDE.md

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

CLAUDE.md

@@ -98,6 +98,29 @@ Compiled .mo files are built by the Gitea CI/CD pipeline during releases. For lo
 for po in languages/wp-bootstrap-*.po; do msgfmt -o "${po%.po}.mo" "$po"; done
 ```
 
+#### Updating Translations
+
+When new strings are added to PHP sources, use the fast JSON workflow documented in
+`wp-jobroom-theme/CLAUDE.md → Updating Translations (Fast JSON Workflow)`. That
+document contains the full step-by-step process including the `patch-po.py` patcher script
+(located in `wp-jobroom-theme/languages/patch-po.py`) which patches **both** `wp-bootstrap`
+and `wp-jobroom-theme` `.po` files in a single pass.
+
+**Quick reference for wp-bootstrap POT regeneration:**
+
+```bash
+docker exec jobroom-wordpress wp i18n make-pot \
+  /var/www/html/wp-content/themes/wp-bootstrap \
+  /var/www/html/wp-content/themes/wp-bootstrap/languages/wp-bootstrap.pot \
+  --allow-root
+
+# Then merge into all .po files:
+for locale in de_CH de_CH_informal de_DE de_DE_informal en_GB es_ES fr_CH fr_FR it_CH it_IT nl_NL pl_PL pt_PT; do
+  msgmerge --update --backup=none --no-fuzzy-matching \
+    languages/wp-bootstrap-${locale}.po languages/wp-bootstrap.pot
+done
+```
+
 ### Create Releases
 
 **Important Git Notes:**