diff --git a/document.code-workspace b/document.code-workspace
index e01256b9..3b13ff77 100644
--- a/document.code-workspace
+++ b/document.code-workspace
@@ -26,7 +26,7 @@
                 "options": {
                     "env": {
                         "SPHINXBUILD": "sphinx-autobuild",
-                        "SPHINXOPTS": "-D language='${input:language}'"
+                        "LANGUAGE": "${input:language}"
                     },
                     "cwd": "${workspaceFolder:document}"
                 },
@@ -41,7 +41,7 @@
                 ],
                 "options": {
                     "env": {
-                        "SPHINXOPTS": "-D language='${input:language}'"
+                        "LANGUAGE": "${input:language}"
                     },
                     "cwd": "${workspaceFolder:document}"
                 },
diff --git a/next/README.md b/next/README.md
index 0cec7fc6..1384f86d 100644
--- a/next/README.md
+++ b/next/README.md
@@ -40,7 +40,7 @@ python3 -m http.server -d _build/html
 For Chinese version:
 
 ```bash
-make -e SPHINXOPTS="-D language='zh_CN'" html
+LANGUAGE="zh_CN" make html
 python3 -m http.server -d _build/html
 ```
 
diff --git a/next/conf.py b/next/conf.py
index fcfaa404..376b6c2f 100644
--- a/next/conf.py
+++ b/next/conf.py
@@ -6,11 +6,21 @@
 # -- Project information -----------------------------------------------------
 # https://www.sphinx-doc.org/en/master/usage/configuration.html#project-information
 
-project = 'MoonBit Document'
-copyright = '2025, International Digital Economy Academy'
+project = 'MoonBit'
 author = 'International Digital Economy Academy'
+copyright = '%Y, {author}'.format(author=author)
 release = 'v0.1.20250113'
 
+# I18N based on Readthedocs Environment
+# https://docs.readthedocs.io/en/stable/reference/environment-variables.html
+import os
+if (os.getenv('READTHEDOCS_LANGUAGE') == 'zh-cn' or
+    os.getenv('LANGUAGE') == 'zh_CN'): # For local build
+    project = 'MoonBit 月兔'
+    author = '粤港澳大湾区数字经济院'
+    copyright = '%Y, {author}'.format(author=author)
+    language = 'zh_CN'
+
 # -- General configuration ---------------------------------------------------
 # https://www.sphinx-doc.org/en/master/usage/configuration.html#general-configuration
 
@@ -39,7 +49,7 @@
     "use_edit_page_button": True,
     "use_issues_button": True,
     "logo": {
-        "text":"MoonBit Documentation",
+        "text":"MoonBit 月兔",
     }
 }
 html_logo = "_static/logo.png"