When it comes to multilingual sites, I am not that knowledgable but it is important as more and more companies and web sites need to go multilingual.
A Google Webmaster Help thread has an SEO claiming there is a bug in Google but the reality, Google is confused by how the content is written and the URLs are designed.
The specific example is this URL, which has the eng in the URL path:
Now, the snippet in Google shows mixed content, both French and English.
John Mueller explained the issue is related to having primary content untranslated in many cases, making Google think they should not necessarily trust the href lang implementation. John wrote:
Forum discussion at Google Webmaster Help.
