Merge pull request #3336 from jjangsangy:fix-missing-tostring

fix: add missing tostring() call

Author: sumneko

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`

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