diff --git a/frontend/src/Calendar/Legend/Legend.js b/frontend/src/Calendar/Legend/Legend.js
index f6e970e8b..6413665d3 100644
--- a/frontend/src/Calendar/Legend/Legend.js
+++ b/frontend/src/Calendar/Legend/Legend.js
@@ -56,7 +56,7 @@ function Legend(props) {
   if (showCutoffUnmetIcon) {
     iconsToShow.push(
       <LegendIconItem
-        name={translate('Cutoff Not Met')}
+        name={translate('CutoffNotMet')}
         icon={icons.EPISODE_FILE}
         kind={kinds.WARNING}
         fullColorEvents={fullColorEvents}
diff --git a/frontend/src/Utilities/String/translate.ts b/frontend/src/Utilities/String/translate.ts
index 76ab770ea..9a633040c 100644
--- a/frontend/src/Utilities/String/translate.ts
+++ b/frontend/src/Utilities/String/translate.ts
@@ -27,6 +27,12 @@ export default function translate(
   key: string,
   tokens: Record<string, string | number | boolean> = {}
 ) {
+  const { isProduction = true } = window.Sonarr;
+
+  if (!isProduction && !(key in translations)) {
+    console.warn(`Missing translation for key: ${key}`);
+  }
+
   const translation = translations[key] || key;
 
   tokens.appName = 'Sonarr';
diff --git a/frontend/typings/Globals.d.ts b/frontend/typings/Globals.d.ts
index d11f99013..47c7a49da 100644
--- a/frontend/typings/Globals.d.ts
+++ b/frontend/typings/Globals.d.ts
@@ -7,5 +7,6 @@ interface Window {
     theme: string;
     urlBase: string;
     version: string;
+    isProduction: boolean;
   };
 }
diff --git a/src/NzbDrone.Core/Localization/Core/en.json b/src/NzbDrone.Core/Localization/Core/en.json
index a478ad5b3..aceda5965 100644
--- a/src/NzbDrone.Core/Localization/Core/en.json
+++ b/src/NzbDrone.Core/Localization/Core/en.json
@@ -237,6 +237,7 @@
   "CollectionsLoadError": "Unable to load collections",
   "ColonReplacement": "Colon Replacement",
   "ColonReplacementFormatHelpText": "Change how {appName} handles colon replacement",
+  "Completed": "Completed",
   "CompletedDownloadHandling": "Completed Download Handling",
   "Component": "Component",
   "Condition": "Condition",
@@ -302,6 +303,7 @@
   "CustomFormatsSpecificationResolution": "Resolution",
   "CustomFormatsSpecificationSource": "Source",
   "Cutoff": "Cutoff",
+  "CutoffNotMet": "Cutoff Not Met",
   "CutoffUnmet": "Cutoff Unmet",
   "CutoffUnmetLoadError": "Error loading cutoff unmet items",
   "CutoffUnmetNoItems": "No cutoff unmet items",
@@ -542,8 +544,8 @@
   "DownloadClientStatusSingleClientHealthCheckMessage": "Download clients unavailable due to failures: {downloadClientNames}",
   "DownloadClientTransmissionSettingsDirectoryHelpText": "Optional location to put downloads in, leave blank to use the default Transmission location",
   "DownloadClientTransmissionSettingsUrlBaseHelpText": "Adds a prefix to the {clientName} rpc url, eg {url}, defaults to '{defaultUrl}'",
-  "DownloadClientUnavailable": "Download Client Unavailable",
   "DownloadClientUTorrentTorrentStateError": "uTorrent is reporting an error",
+  "DownloadClientUnavailable": "Download Client Unavailable",
   "DownloadClientValidationApiKeyIncorrect": "API Key Incorrect",
   "DownloadClientValidationApiKeyRequired": "API Key Required",
   "DownloadClientValidationAuthenticationFailure": "Authentication Failure",
@@ -1155,6 +1157,7 @@
   "MediaManagementSettingsSummary": "Naming, file management settings and root folders",
   "Medium": "Medium",
   "MegabytesPerMinute": "Megabytes Per Minute",
+  "Menu": "Menu",
   "Message": "Message",
   "Metadata": "Metadata",
   "MetadataLoadError": "Unable to load Metadata",
@@ -1575,6 +1578,7 @@
   "PreferredProtocol": "Preferred Protocol",
   "PreferredSize": "Preferred Size",
   "PrefixedRange": "Prefixed Range",
+  "Premiere": "Premiere",
   "Presets": "Presets",
   "PreviewRename": "Preview Rename",
   "PreviewRenameSeason": "Preview Rename for this season",