diff --git a/lib/constants.ts b/lib/constants.ts
index cae654a6..c275ed8d 100644
--- a/lib/constants.ts
+++ b/lib/constants.ts
@@ -13,7 +13,7 @@ export const REPO_URL = 'https://github.com/umami-software/umami';
 export const UPDATES_URL = 'https://api.umami.is/v1/updates';
 export const TELEMETRY_PIXEL = 'https://i.umami.is/a.png';
 
-export const DEFAULT_LOCALE = 'en-US';
+export const DEFAULT_LOCALE = process.env.defaultLocale ?? 'en-US';
 export const DEFAULT_THEME = 'light';
 export const DEFAULT_ANIMATION_DURATION = 300;
 export const DEFAULT_DATE_RANGE = '24hour';
diff --git a/next.config.js b/next.config.js
index 0778f979..2165a6e0 100644
--- a/next.config.js
+++ b/next.config.js
@@ -74,6 +74,7 @@ if (process.env.CLOUD_MODE && process.env.CLOUD_URL && process.env.DISABLE_LOGIN
 const config = {
   env: {
     currentVersion: pkg.version,
+    defaultLocale: process.env.DEFAULT_LOCALE,
     isProduction: process.env.NODE_ENV === 'production',
   },
   basePath: process.env.BASE_PATH,