diff --git a/front_end/core/host/UserMetrics.ts b/front_end/core/host/UserMetrics.ts
index c23925b16c..f811bb8dac 100644
--- a/front_end/core/host/UserMetrics.ts
+++ b/front_end/core/host/UserMetrics.ts
@@ -569,7 +569,6 @@ export const DevtoolsExperiments: {
   'ignoreListJSFramesOnTimeline': 43,
   'contrastIssues': 44,
   'experimentalCookieFeatures': 45,
-  'localizedDevTools': 46,
   'bfcacheDebugging': 47,
   'hideIssuesFeature': 48,
   'reportingApiDebugging': 49,
diff --git a/front_end/core/root/Runtime.ts b/front_end/core/root/Runtime.ts
index 98f40bacb6..c5ef8db03e 100644
--- a/front_end/core/root/Runtime.ts
+++ b/front_end/core/root/Runtime.ts
@@ -554,7 +554,6 @@ export enum ExperimentName {
   ALL = '*',
   PROTOCOL_MONITOR = 'protocolMonitor',
   WEBAUTHN_PANE = 'webauthnPane',
-  LOCALIZED_DEVTOOLS = 'localizedDevTools',
   SYNC_SETTINGS = 'syncSettings',
 }
 
diff --git a/front_end/entrypoints/main/MainImpl.ts b/front_end/entrypoints/main/MainImpl.ts
index b112a2842c..d41d29314a 100644
--- a/front_end/entrypoints/main/MainImpl.ts
+++ b/front_end/entrypoints/main/MainImpl.ts
@@ -151,13 +151,7 @@ export class MainImpl {
   }
 
   async requestAndRegisterLocaleData(): Promise<void> {
-    // The language setting is only available when the experiment is enabled.
-    // TODO(crbug.com/1163928): Remove the check when the experiment is gone.
-    let settingLanguage = 'en-US';
-    if (Root.Runtime.experiments.isEnabled(Root.Runtime.ExperimentName.LOCALIZED_DEVTOOLS)) {
-      settingLanguage = Common.Settings.Settings.instance().moduleSetting<string>('language').get();
-    }
-
+    const settingLanguage = Common.Settings.Settings.instance().moduleSetting<string>('language').get();
     const devToolsLocale = i18n.DevToolsLocale.DevToolsLocale.instance({
       create: true,
       data: {
@@ -325,15 +319,11 @@ export class MainImpl {
     // Hide Issues Feature.
     Root.Runtime.experiments.register('groupAndHideIssuesByKind', 'Allow grouping and hiding of issues by IssueKind');
 
-    // Localized DevTools, hide "locale selector" setting behind an experiment.
-    Root.Runtime.experiments.register(Root.Runtime.ExperimentName.LOCALIZED_DEVTOOLS, 'Enable localized DevTools');
-
     // Checkbox in the Settings UI to enable Chrome Sync is behind this experiment.
     Root.Runtime.experiments.register(
         Root.Runtime.ExperimentName.SYNC_SETTINGS, 'Sync DevTools settings with Chrome Sync');
 
     Root.Runtime.experiments.enableExperimentsByDefault([
-      Root.Runtime.ExperimentName.LOCALIZED_DEVTOOLS,
       'sourceOrderViewer',
       'hideIssuesFeature',
       'bfcacheDebugging',
diff --git a/front_end/entrypoints/main/main-meta.ts b/front_end/entrypoints/main/main-meta.ts
index 1ed1b8aedf..003ef1cf0d 100644
--- a/front_end/entrypoints/main/main-meta.ts
+++ b/front_end/entrypoints/main/main-meta.ts
@@ -769,7 +769,6 @@ Common.Settings.registerSettingExtension({
     ...filterLocalesForSettings().map(locale => createOptionForLocale(locale)),
   ],
   reloadRequired: true,
-  experiment: Root.Runtime.ExperimentName.LOCALIZED_DEVTOOLS,
 });
 
 Common.Settings.registerSettingExtension({
diff --git a/front_end/panels/lighthouse/LighthouseProtocolService.ts b/front_end/panels/lighthouse/LighthouseProtocolService.ts
index b2440a1f28..33df275118 100644
--- a/front_end/panels/lighthouse/LighthouseProtocolService.ts
+++ b/front_end/panels/lighthouse/LighthouseProtocolService.ts
@@ -5,7 +5,6 @@
 import * as i18n from '../../core/i18n/i18n.js';
 import type * as ProtocolClient from '../../core/protocol_client/protocol_client.js';
 import * as SDK from '../../core/sdk/sdk.js';
-import * as Root from '../../core/root/root.js';
 
 import type * as ReportRenderer from './LighthouseReporterTypes.js';
 
@@ -35,10 +34,7 @@ export class ProtocolService {
   }
 
   getLocales(): readonly string[] {
-    if (Root.Runtime.experiments.isEnabled(Root.Runtime.ExperimentName.LOCALIZED_DEVTOOLS)) {
-      return [i18n.DevToolsLocale.DevToolsLocale.instance().locale];
-    }
-    return navigator.languages;
+    return [i18n.DevToolsLocale.DevToolsLocale.instance().locale];
   }
 
   startLighthouse(auditURL: string, categoryIDs: string[], flags: Object): Promise<ReportRenderer.RunnerResult> {
diff --git a/front_end/ui/legacy/InspectorView.ts b/front_end/ui/legacy/InspectorView.ts
index bb88d3e403..cb0709774e 100644
--- a/front_end/ui/legacy/InspectorView.ts
+++ b/front_end/ui/legacy/InspectorView.ts
@@ -443,10 +443,6 @@ function getDisableLocaleInfoBarSetting(): Common.Settings.Setting<boolean> {
 }
 
 function shouldShowLocaleInfobar(): boolean {
-  if (!Root.Runtime.experiments.isEnabled(Root.Runtime.ExperimentName.LOCALIZED_DEVTOOLS)) {
-    return false;
-  }
-
   if (getDisableLocaleInfoBarSetting().get()) {
     return false;
   }