diff --git a/news/5207.bugfix b/news/5207.bugfix
new file mode 100644
index 0000000000..3b232b0b74
--- /dev/null
+++ b/news/5207.bugfix
@@ -0,0 +1 @@
+restrict moment.js locales to supported languages @mamico
diff --git a/package.json b/package.json
index 04e53f270c..43b2a701b5 100644
--- a/package.json
+++ b/package.json
@@ -422,6 +422,7 @@
     "jest": "26.6.3",
     "jest-environment-jsdom": "^26",
     "jsonwebtoken": "9.0.0",
+    "moment-locales-webpack-plugin": "1.2.0",
     "react-error-overlay": "6.0.9",
     "react-is": "^16.13.1",
     "release-it": "^16.1.3",
diff --git a/razzle.config.js b/razzle.config.js
index e004de5a34..d7dafc57f3 100644
--- a/razzle.config.js
+++ b/razzle.config.js
@@ -13,6 +13,7 @@ const AddonConfigurationRegistry = require('./addon-registry');
 const CircularDependencyPlugin = require('circular-dependency-plugin');
 const TerserPlugin = require('terser-webpack-plugin');
 const CssMinimizerPlugin = require('css-minimizer-webpack-plugin');
+const MomentLocalesPlugin = require('moment-locales-webpack-plugin');
 
 const fileLoaderFinder = makeLoaderFinder('file-loader');
 
@@ -133,12 +134,9 @@ const defaultModify = ({
     }
 
     config.plugins.unshift(
-      // restrict moment.js locales to en/de
-      // see https://github.com/jmblog/how-to-optimize-momentjs-with-webpack for details
-      new webpack.ContextReplacementPlugin(
-        /moment[/\\]locale$/,
-        new RegExp(Object.keys(languages).join('|')),
-      ),
+      // restrict moment.js locales to supported languages
+      // see https://momentjs.com/docs/#/use-it/webpack/ for details
+      new MomentLocalesPlugin({ localesToKeep: Object.keys(languages) }),
       new LodashModuleReplacementPlugin({
         shorthands: true,
         cloning: true,
diff --git a/yarn.lock b/yarn.lock
index a0db202cfc..a2ba724770 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -3327,6 +3327,7 @@ __metadata:
     lodash-webpack-plugin: 0.11.6
     mini-css-extract-plugin: 2.7.2
     moment: 2.29.4
+    moment-locales-webpack-plugin: 1.2.0
     object-assign: 4.1.1
     pofile: 1.0.10
     postcss: 8.4.13
@@ -16985,6 +16986,13 @@ __metadata:
   languageName: node
   linkType: hard
 
+"lodash.difference@npm:^4.5.0":
+  version: 4.5.0
+  resolution: "lodash.difference@npm:4.5.0"
+  checksum: ecee276aa578f300e79350805a14a51be8d1f12b3c1389a19996d8ab516f814211a5f65c68331571ecdad96522b863ccc484b55504ce8c9947212a29f8857d5a
+  languageName: node
+  linkType: hard
+
 "lodash.escaperegexp@npm:^4.1.2":
   version: 4.1.2
   resolution: "lodash.escaperegexp@npm:4.1.2"
@@ -17837,6 +17845,18 @@ __metadata:
   languageName: node
   linkType: hard
 
+"moment-locales-webpack-plugin@npm:1.2.0":
+  version: 1.2.0
+  resolution: "moment-locales-webpack-plugin@npm:1.2.0"
+  dependencies:
+    lodash.difference: ^4.5.0
+  peerDependencies:
+    moment: ^2.8.0
+    webpack: ^1 || ^2 || ^3 || ^4 || ^5
+  checksum: bb5daebfc2f2bd0c003b9d576893531edc6ac3c884c77fc4c3a7c8d228340c9a26a5c7676c8e4505922eebb1309f2defbcf619a1706d7d7e579039690df2487b
+  languageName: node
+  linkType: hard
+
 "moment@npm:2.29.4, moment@npm:2.x, moment@npm:>=1.6.0":
   version: 2.29.4
   resolution: "moment@npm:2.29.4"