Assume I run a multi-lingual website. If I had a Spanish section, it should be included in Spanish-segmented search engines such as
- Google Spain
- Google Peru
- Google El Salvador
and excluded in the others. Likewise, even though the website would have content in Chinese, multilingual countries such as Singapore should feature content in their main language (English in this case).
What is the best approach to ensure the appropriate language is associated with Google's search indices?