Move i18n.t override from debug mode to normal frontend and change it from error to warning

packages/common/i18next.js

@@ -125,19 +125,16 @@ export function createInstance(languages, lng, fallback, namespace) {
     i18n.init(options);
     console.assert(i18n.isInitialized);
 
-    // if debug mode is activated, override i18n.t() to print errors if keys are missing
-    if (window.location.hash.includes('debug')) {
-        const translate = i18n.t;
-        const that = i18n;
-
-        i18n.t = function (keys, options) {
-            if (!that.exists(keys)) {
-                console.error("Error: Translation key " + keys + " does not exist!");
-            }
-
-            return translate(keys, options);
-        };
-    }
+    // override i18n.t() to print warnings if keys are missing
+    const translate = i18n.t;
+    const that = i18n;
+    i18n.t = function (keys, options) {
+        if (!that.exists(keys)) {
+            console.warn("Translation warning: Default key " + keys + " does not exist!");
+        }
+
+        return translate(keys, options);
+    };
 
     return i18n;
 }