diff --git a/Projects/Server.Tests/Tests/Localization/LocalizationEntryTests.cs b/Projects/Server.Tests/Tests/Localization/LocalizationEntryTests.cs
index 154cfe7a6..a240a0576 100644
--- a/Projects/Server.Tests/Tests/Localization/LocalizationEntryTests.cs
+++ b/Projects/Server.Tests/Tests/Localization/LocalizationEntryTests.cs
@@ -17,4 +17,27 @@ public class LocalizationEntryTests
         Assert.Equal("This tests clilocs as parameters.", numericFormatter);
         Assert.Equal("This tests clilocs as parameters.", stringParam);
     }
+
+    [Fact]
+    public void RemovingTheLastFallbackEntry_KeepsLaterAddsVisible()
+    {
+        Localization.Clear();
+
+        try
+        {
+            Localization.Add("enu", 500004, "first");
+            Assert.True(Localization.Remove("enu", 500004));
+
+            Localization.Add("enu", 500005, "second");
+
+            Assert.False(Localization.TryGetLocalization(500004, out _));
+            Assert.True(Localization.TryGetLocalization(500005, out var entry));
+            Assert.Equal("second", entry.Text);
+        }
+        finally
+        {
+            // Lets the next lookup reload the real tables from disk.
+            Localization.Clear();
+        }
+    }
 }
diff --git a/Projects/Server/Localization/Localization.cs b/Projects/Server/Localization/Localization.cs
index 21dbe801f..0b0bde43c 100644
--- a/Projects/Server/Localization/Localization.cs
+++ b/Projects/Server/Localization/Localization.cs
@@ -68,7 +68,9 @@ public static class Localization
             return false;
         }
 
-        if (entries.Count == 0)
+        // The fallback table stays registered even when empty: _fallbackEntries points at it, and a
+        // replacement created by a later Add would be invisible to fallback lookups.
+        if (entries.Count == 0 && entries != _fallbackEntries)
         {
             _localizations.Remove(lang);
         }