diff --git a/TIPS.md b/TIPS.md
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@@ -32,3 +32,4 @@ Going forward, new tips are pushed automatically by the `mc_survival_tips.py` cr
 - [Tip #37](tips/2026-07-18-037-search-fuzzy-search-for-items-recipes.md) (2026-07-18) — **search**: Fuzzy-Search for items & recipes
 - [Tip #38](tips/2026-07-19-038-admin-audit-log-who-changed-what.md) (2026-07-19) — **admin**: Audit-Log: who changed what
 - [Tip #39](tips/2026-07-20-039-performance-native-lazy-loading-for-item-icons.md) (2026-07-20) — **performance**: Native lazy-loading for item icons
+- [Tip #40](tips/2026-07-21-040-i18n-add-english-ui-translation.md) (2026-07-21) — **i18n**: Add English UI translation
diff --git a/tips/2026-07-21-040-i18n-add-english-ui-translation.md b/tips/2026-07-21-040-i18n-add-english-ui-translation.md
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+---
+tip_number: 40
+date: 2026-07-21
+category: i18n
+status: pending
+---
+
+# Tip #40 — Add English UI translation
+
+**Date:** 2026-07-21  
+**Category:** i18n  
+**Source:** MC-Survival Wiki Daily Tip (cron @ 18:00 MESZ)
+
+## Add English UI translation
+
+Mirror the existing German translation files into an en.json with the same structure, then add a locale switcher in the header so non-German visitors can switch languages. It solves the immediate bounce problem: non-German-speaking players and potential contributors hit the wiki and leave within seconds when every nav label is in a language they do not read. The signal is audience composition — the GitHub repo and the server's English-speaking community are both larger than the German-only UI suggests. Translating only the most-seen strings (nav, search, errors, buttons) is enough to flip the bounce rate; the long tail can be translated later or fall back to German.
+
+## Implementation tips
+
+1. Create en.json mirroring the structure of the existing de.json (or whatever the source is in i18n.ts).
+2. Translate the most-seen UI strings first: nav, search, error messages, button labels — not the long-tail.
+3. Add a locale switcher in the header (already a common shadcn pattern).