diff --git a/src/utils/index.js b/src/utils/index.js
index 309c1dc..ad652a8 100644
--- a/src/utils/index.js
+++ b/src/utils/index.js
@@ -78,12 +78,14 @@ export const addPolyfills = () => {
  * Helper to init the i18n class with a pre-defined or auto-detected locale.
  */
 export const setLocale = locale => {
-  try {
-    const l = locale === 'auto' ?
-      window.navigator.userLanguage || window.navigator.language : locale;
+  if (locale) {
+    try {
+      const l = locale === 'auto' ?
+        window.navigator.userLanguage || window.navigator.language : locale;
 
-    I18n.init(l);
-  } catch (error) {
-    console.warn(`Unsupported locale '${locale}'. Falling back to default en.`);
+      I18n.init(l);
+    } catch (error) {
+      console.warn(`Unsupported locale '${locale}'. Falling back to default en.`);
+    }
   }
 }
\ No newline at end of file