diff --git a/src/i18n/locales/pl/leftSidebar/languages.json b/src/i18n/locales/pl/leftSidebar/languages.json
index c9c40267..8457ac92 100644
--- a/src/i18n/locales/pl/leftSidebar/languages.json
+++ b/src/i18n/locales/pl/leftSidebar/languages.json
@@ -2,6 +2,9 @@
   "key": {
     "label": "Nazwa"
   },
+  "level": {
+    "label": "Poziom"
+  },
   "rating": {
     "label": "Ocena"
   }