When you use hreflang as well as canonical tags on your website, you have to be careful not to send confusing signals to Google. Here's how to implement hreflang when you already have a canonical tag solution on your website.
Can multiple hreflang tags point to one URL? John Mueller of Google says YES.
The correct implementation of hreflang annotations is quite a challenge for lots of webmasters, especially as Google's official documentation leaves a lot of room for interpretation. At SMX Munich 2016, John Mueller of Google shared some interesting information that is not included in Google's specifications. Read the full story here.