v2.6 Claudia: Update Japanese web interface and update content
Updates
✔️ 🤶 Update Japanese web interface #482
✔️ 🤶 Update content with new German translations and new examples #483
✔️ 🤶 Check all examples for search irregularities #484
Bugs
✔️ 🤶 Part of section title disappears when this part is in a search string #480
✔️ 🤶 Search for wirklich.* ‚Das ist Leiden.‘
doesn't work #485