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Although the Lang attribute tag is not a direct ranking factor in SEO, it plays an important role in helping search engines understand and correctly parse page content. By correctly using the Lang attribute tag, you can not only improve your website's visibility in search engines and user experience, but also ensure that your website's multilingual support is effectively handled and optimized. The following are the importance and role of the Lang attribute tag in SEO:
1. Language specification and multilingual websites
Language identification: The Lang attribute tag (<html lang="en">) helps search engines identify the language of a page, which is especially important for multilingual websites. Search engines can determine which version of the page is most suitable for a specific search query based on the Lang attribute.
Multilingual SEO: In multilingual websites, correctly setting the Lang attribute can help search engines understand each page's language version, improving responsiveness and accuracy for search queries in different languages.
2. User experience and accessibility
User orientation: The Lang attribute is not only beneficial for search engines but also helps users understand the page language. This can enhance users' overall experience and satisfaction, ensuring they can access the content version they understand.
3. SEO best practices
Standardization: Using ISO language codes (for example, "en" for English, "zh" for Chinese, etc.) to set the Lang attribute is a standardized and recommended practice, helping search engines accurately parse page language information.
Consistency: Ensure that Lang attribute settings are consistent throughout the website, especially in multilingual websites, which is key to ensuring search engines correctly understand and process each language version.
4. W3C standards and accessibility
Compliance with W3C standards: The Lang attribute is part of W3C standards, and compliance with this standard can help ensure that your website's technical implementation and accessibility meet international standards.
Recommendations for implementing Lang attribute tags:
Placement: The Lang attribute is typically placed in the <html> tag, for example:
Use correct language codes: Ensure you select the correct ISO language codes to accurately reflect the main language version of the page.
Detailed Specifications:
1. Language codes in the tag follow the ISO 639 standard, avoiding the use of generic codes, such as specific codes (like zh-CN or zh-TW).
2. Ensure that language codes used throughout the website or application are consistent;
Example:
<html lang="en-US">
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