The rules for effective hreflang are complex, and it’s easy for even the most experienced SEOs to screw it up. This is probably one of the reasons why Google only considers hreflang as a “hint” for ranking and positioning purposes.
Regardless, if you use hreflang, you’ll need to validate your tags. Third-party tools like Merkle’s hreflang Tags Testing Tool or Aleyda Solis’ hreflang Tags Generator Tool can help.
As we said, Google considers hreflang as a “hint” when targeting content to a specific audience and combines it with many other cues, including the language of the page.
Therefore, the language of your page should be obvious. Mixing france mobile database languages on a page sends mixed signals.
If you load a page in Chrome and Google offers to translate from a language that isn't obvious, you may be sending mixed language signals. Often, eliminating boilerplate text or navigation elements may fix the problem, or simply adding more content in the appropriate language.
Avoid automatic redirects
By far one of the biggest mistakes websites make with language and geo-targeting is automatic redirects . Websites often detect the user’s location through their IP or other information, and then try to automatically redirect them to the “correct” page for simplicity’s sake.
Unfortunately, this is bad practice.
Automatic redirects can hide content from both users and Google. If Google itself is automatically redirected, it may never crawl all of your content.