Screaming frog tells me that I have missing confirmation links in my hreflang, but I cannot seem to identify the problem. Here is a screenshot of the code on our Korean page: enter image description here

Here is a screenshot of the code on our regular US page. Anyone have an idea of what I'm doing wrong? Thanks! enter image description here


I see two potential problems. The language code is in ISO 639-1 format while the country/region code is in ISO 3166-1 Alpha 2 format.

Issue 1 (minor):

  • ISO 639-1 should be written in lowercase en
  • ISO 3166-1 Alpha 2 should be written in uppercase GB
  • Example: en-GB

Issue 2 (major):

You seem to be using `rel="alternative" which doesn't exist:


Error: Bad value alternative for attribute rel on element link: The string alternative is not a registered keyword.

Change all alternative occurrences to alternate. I also recommend that you use a proper markup checker rather than screaming frog, such as W3C validator. By doing it'll help you narrow down problems with more explanation, since its obvious that Screaming Frog failed you in this instance.

  • Thank you so much! I thought I was losing my mind. Beside those two fixes do you see any other issues with the hreflang?
    – Natalie
    Aug 16 '18 at 1:31
  • "The country code is in ISO 639-1 format while the language is in ISO 3166-1 Alpha 2 format." - You mean the other way round: "ISO 639-1" defines the language code, whereas "ISO 3166-1 Alpha 2" defines the country/region code. However, whilst the country codes are generally defined as uppercase, these values are always compared case-insensitively. So, any differences in case is purely cosmetic. In fact, many authoritative examples (including Google) include all lowercase country codes in their hreflang attributes.
    – MrWhite
    Aug 20 '18 at 9:42
  • @MrWhite, feel free to improve answers by clicking 'edit'. Aug 20 '18 at 15:58

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