diff --git a/html/src/app.js b/html/src/app.js
index 4a919854..e6ca85ae 100644
--- a/html/src/app.js
+++ b/html/src/app.js
@@ -10133,7 +10133,10 @@ speechSynthesis.getVoices();
     $app.data._stringComparer = undefined;
     $app.computed.stringComparer = function () {
         if (typeof this._stringComparer === 'undefined') {
-            this._stringComparer = Intl.Collator(this.appLanguage, { usage: "search", sensitivity: "base" });
+            this._stringComparer = Intl.Collator(
+                this.appLanguage.replace("_", "-"),
+                { usage: "search", sensitivity: "base" }
+            );
         }
         return this._stringComparer;
     }
@@ -32331,6 +32334,7 @@ speechSynthesis.getVoices();
         configRepository.setString('VRCX_appLanguage', language);
         this.applyLanguageStrings();
         this.updateVRConfigVars();
+        this._stringComparer = undefined;
     };
 
     // #endregion