diff --git a/components/alert/demo/icon.md b/components/alert/demo/icon.md
index a6fda9ec6..1e8743db9 100644
--- a/components/alert/demo/icon.md
+++ b/components/alert/demo/icon.md
@@ -17,31 +17,31 @@ Decent icon make information more clear and more friendly.
 import { Alert } from 'antd';
 
 ReactDOM.render(<div>
-  <Alert message="成功提示的文案" type="success" showIcon />
-  <Alert message="消息提示的文案" type="info" showIcon />
-  <Alert message="警告提示的文案" type="warning" showIcon />
-  <Alert message="错误提示的文案" type="error" showIcon />
+  <Alert message="Copywriting Success Tips" type="success" showIcon />
+  <Alert message="Copywriting Informational Notes" type="info" showIcon />
+  <Alert message="Copywriting Warning" type="warning" showIcon />
+  <Alert message="Copywriting Error" type="error" showIcon />
   <Alert
-    message="成功提示的文案"
-    description="成功提示的辅助性文字介绍成功提示的辅助性文字介绍成功提示的辅助性文字介绍成功提示的辅助性文字介绍"
+    message="Copywriting success tips"
+    description="Detailed description and advices about successful copywriting."
     type="success"
     showIcon
   />
   <Alert
-    message="消息提示的文案"
-    description="消息提示的辅助性文字介绍消息提示的辅助性文字介绍消息提示的辅助性文字介绍"
+    message="Copywriting Informational Notes"
+    description="Additional description and informations about copywriting."
     type="info"
     showIcon
   />
   <Alert
-    message="警告提示的文案"
-    description="警告提示的辅助性文字介绍警告提示的辅助性文字介绍"
+    message="Copywriting Warning"
+    description="This is a warning notice about copywriting."
     type="warning"
     showIcon
   />
   <Alert
-    message="错误提示的文案"
-    description="错误提示的辅助性文字介绍错误提示的辅助性文字介绍错误提示的辅助性文字介绍错误提示的辅助性文字介绍错误提示的辅助性文字介绍错误提示的辅助性文字介绍"
+    message="Copywriting Error"
+    description="This is an error message about copywriting."
     type="error"
     showIcon
   />
diff --git a/components/alert/demo/style.md b/components/alert/demo/style.md
index d5bb48795..7fae3b28b 100644
--- a/components/alert/demo/style.md
+++ b/components/alert/demo/style.md
@@ -11,7 +11,7 @@ title:
 
 ## en-US
 
-There are 4 kinds of Alert: `success`, `info`, `warning`, `error`.
+There are 4 types of Alert: `success`, `info`, `warning`, `error`.
 
 ````jsx
 import { Alert } from 'antd';
diff --git a/components/tooltip/demo/arrow-point-at-center.md b/components/tooltip/demo/arrow-point-at-center.md
index 3eb7aa37b..9e53fe8db 100644
--- a/components/tooltip/demo/arrow-point-at-center.md
+++ b/components/tooltip/demo/arrow-point-at-center.md
@@ -1,20 +1,28 @@
 ---
 order: 2
-title: 箭头指向
+title:
+  zh-CN: 箭头指向
+  en-US: Arrow pointing at the center
 ---
 
+## zh-CN
+
 设置了 `arrowPointAtCenter` 后，箭头将指向目标元素的中心。
 
+## en-US
+
+By specifying `arrowPointAtCenter` prop, the arrow will point to the center of the target element.
+
 ````jsx
 import { Tooltip, Button } from 'antd';
 
 ReactDOM.render(
   <div>
-    <Tooltip placement="topLeft" title="提示文字 提示文字">
-      <Button>默认对齐元素边缘</Button>
+    <Tooltip placement="topLeft" title="Prompt Text">
+      <Button>Tooltip default pointing alignment</Button>
     </Tooltip>
-    <Tooltip placement="topLeft" title="提示文字 提示文字" arrowPointAtCenter>
-      <Button>箭头指向目标元素的中心</Button>
+    <Tooltip placement="topLeft" title="Prompt Text" arrowPointAtCenter>
+      <Button>Tooltip central alignment</Button>
     </Tooltip>
   </div>
 , mountNode);
diff --git a/components/upload/demo/basic.md b/components/upload/demo/basic.md
index 61a7f67f1..c0653c0c4 100644
--- a/components/upload/demo/basic.md
+++ b/components/upload/demo/basic.md
@@ -27,9 +27,9 @@ const props = {
       console.log(info.file, info.fileList);
     }
     if (info.file.status === 'done') {
-      message.success(`${info.file.name} 上传成功。`);
+      message.success(`${info.file.name} file uploaded successfully`);
     } else if (info.file.status === 'error') {
-      message.error(`${info.file.name} 上传失败。`);
+      message.error(`${info.file.name} file upload failed.`);
     }
   },
 };
@@ -37,7 +37,7 @@ const props = {
 ReactDOM.render(
   <Upload {...props}>
     <Button type="ghost">
-      <Icon type="upload" /> 点击上传
+      <Icon type="upload" /> Click to Upload
     </Button>
   </Upload>
 , mountNode);
diff --git a/components/upload/demo/drag.md b/components/upload/demo/drag.md
index 0fda933bd..f460e05d5 100644
--- a/components/upload/demo/drag.md
+++ b/components/upload/demo/drag.md
@@ -27,9 +27,9 @@ const props = {
       console.log(info.file, info.fileList);
     }
     if (info.file.status === 'done') {
-      message.success(`${info.file.name} 上传成功。`);
+      message.success(`${info.file.name} file uploaded successfully.`);
     } else if (info.file.status === 'error') {
-      message.error(`${info.file.name} 上传失败。`);
+      message.error(`${info.file.name} file upload failed.`);
     }
   },
 };