diff --git a/changelog.md b/changelog.md
index d4ecb8039..c40a9a9ef 100644
--- a/changelog.md
+++ b/changelog.md
@@ -2,6 +2,7 @@
 
 ## Unreleased
 <!-- Add all new changes here. They will be moved under a version at release -->
+* `FIX` convert all keys to string before using
 
 ## 3.16.4
 `2025-12-25`
diff --git a/script/locale-loader.lua b/script/locale-loader.lua
index 018da6806..c98529830 100644
--- a/script/locale-loader.lua
+++ b/script/locale-loader.lua
@@ -2,6 +2,7 @@ local function mergeKey(key, k)
     if not key then
         return k
     end
+    k = tostring(k)
     if k:sub(1, 1):match '%w' then
         return key .. '.' .. k
     else