diff --git a/website/i18n/en.json b/website/i18n/en.json
index a5f7b0f9..7e11c4d0 100644
--- a/website/i18n/en.json
+++ b/website/i18n/en.json
@@ -143,10 +143,6 @@
     "asyncio": "asyncio",
     "Hass.io Add-Ons": "Hass.io Add-Ons",
     "Maintainer docs": "Maintainer docs",
-    "frontend_experiment_card_types": "Type Of Cards",
-    "frontend_experiment_custom_card": "Custom Cards",
-    "frontend_experiment_index": "Experimental UI",
-    "Experimental UI": "Experimental UI"
   },
   "pages-strings": {
     "Learn more using the [documentation on this site.](/test-site/docs/en/doc1.html)|no description given": "Learn more using the [documentation on this site.](/test-site/docs/en/doc1.html)",