diff --git a/docker-compose.yml b/docker-compose.yml
index cbc8a20..537b96d 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -5,6 +5,7 @@ services:
     image: wongsaang/chatgpt-ui-client:latest
     environment:
       - SERVER_DOMAIN=http://backend-web-server
+      - DEFAULT_LOCALE=en
 #      - NUXT_PUBLIC_APP_NAME='ChatGPT UI' # The name of the application
 #      - NUXT_PUBLIC_TYPEWRITER=true # Whether to enable the typewriter effect, default false
 #      - NUXT_PUBLIC_TYPEWRITER_DELAY=50 # The delay time of the typewriter effect, default 50ms
diff --git a/docs/guide/configuration.md b/docs/guide/configuration.md
index e0a4ad1..d902c40 100644
--- a/docs/guide/configuration.md
+++ b/docs/guide/configuration.md
@@ -66,6 +66,7 @@ backend-wsgi-server:
 | Parameter             | Description                                 | Default Value              |
 |-----------------------|---------------------------------------------|----------------------------|
 | SERVER_DOMAIN         | Server Address                              | http://backend-web-server |
+| DEFAULT_LOCALE         | Default Language                           | en                        |
 | NUXT_PUBLIC_APP_NAME  | Application Name                            | ChatGPT UI                 |
 | NUXT_PUBLIC_TYPEWRITER| Enable Typewriter Effect [true/false]       | true                       |
 | NUXT_PUBLIC_TYPEWRITER_DELAY | Typewriter Effect Delay in milliseconds | 50                         |
diff --git a/docs/guide/quick-start.md b/docs/guide/quick-start.md
index 2ff3a23..03b561c 100644
--- a/docs/guide/quick-start.md
+++ b/docs/guide/quick-start.md
@@ -35,6 +35,7 @@ services:
     image: wongsaang/chatgpt-ui-client:latest
     environment:
       - SERVER_DOMAIN=http://backend-web-server
+      - DEFAULT_LOCALE=en
 #      - NUXT_PUBLIC_APP_NAME='ChatGPT UI' # The name of the application
 #      - NUXT_PUBLIC_TYPEWRITER=true # Whether to enable the typewriter effect, default false
 #      - NUXT_PUBLIC_TYPEWRITER_DELAY=50 # The delay time of the typewriter effect, default 50ms
diff --git a/docs/zh/guide/configuration.md b/docs/zh/guide/configuration.md
index fa547a4..db0c0c7 100644
--- a/docs/zh/guide/configuration.md
+++ b/docs/zh/guide/configuration.md
@@ -66,6 +66,7 @@ backend-wsgi-server:
 | 参数                  | 说明                                      | 默认值                    |
 |----------------------|-------------------------------------------|---------------------------|
 | SERVER_DOMAIN                     | 服务端地址                    | http://backend-web-server |
+| DEFAULT_LOCALE                    | 默认语言                      | en                        |
 | NUXT_PUBLIC_APP_NAME              | 应用名称                      |  ChatGPT UI               |
 | NUXT_PUBLIC_TYPEWRITER            | 是否开启 打字机 效果[true/false]|  true                    |
 | NUXT_PUBLIC_TYPEWRITER_DELAY      | 打字机效果的延迟时间，单位：毫秒|  50                       |
diff --git a/docs/zh/guide/quick-start.md b/docs/zh/guide/quick-start.md
index a916b12..571ca7d 100644
--- a/docs/zh/guide/quick-start.md
+++ b/docs/zh/guide/quick-start.md
@@ -37,6 +37,7 @@ services:
     image: wongsaang/chatgpt-ui-client:latest
     environment:
       - SERVER_DOMAIN=http://backend-web-server
+      - DEFAULT_LOCALE=zh
     #      - NUXT_PUBLIC_APP_NAME='ChatGPT UI' # APP 名称
     #      - NUXT_PUBLIC_TYPEWRITER=true # 是否开启 打字机 效果
     #      - NUXT_PUBLIC_TYPEWRITER_DELAY=50 # 打字机效果的延迟时间，单位：毫秒，默认：50
diff --git a/nuxt.config.ts b/nuxt.config.ts
index f3701f0..c27a4c5 100644
--- a/nuxt.config.ts
+++ b/nuxt.config.ts
@@ -63,7 +63,7 @@ export default defineNuxtConfig({
         ],
         lazy: true,
         langDir: 'lang',
-        defaultLocale: 'en',
+        defaultLocale: process.env.DEFAULT_LOCALE || 'en',
         vueI18n: {
             fallbackLocale: 'en',
         },