Can HREFlang be used cross domain?
March 12, 2018

HREFLang Return Tags are Missing

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HREFLang Return Tags are Missing is the most common error shown in Google Webmaster tools for sites that do not have all the pages mapped. Remember, each country/language page is an alternate of all the others so Google expects you to have all of them represented. If you have local sites with 20 pages each then each of the 20 pages on this site must be mapped to each other in order to pass the test.

In the meta element, each version must be listed on each others country language version.

In the XML sitemap, some of the free tools only create one direction versions and not multi-direction which is the case of most of these errors.