This Magento 2 multi store extension adds the alternate hreflang tag for: Pages, Product and Category.
This extension solves a SEO specific problem of content duplication for Google and other search engines.
It automatically adds the HREFLANG tag to pages, product and category of Magento considering your multi store structure.
Google Hreflang reference: https://support.google.com/webmasters/answer/189077?hl=en
MOZ Hreflang reference: https://moz.com/learn/seo/hreflang-tag
PHP 7+
Magento 2
Zend Framework
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Download this package;
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Create the following folder inside your Magento 2 installation
app/code/BrunoCanada/HrefLang
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Paste the files of this package inside the created folder (step 2)
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Run the following command inside your Magento 2 installation:
$ bin/magento setup:upgrade