All about Hreflang Tags and X Default for International SEO

All about Hreflang Tags and X Default for International SEO

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    What is International SEO?

    Normally SEOs like to go niche and focus on a specific range of services for specific countries. Local businesses and most businesses have a limited geographical area where they operate, be it a state, city or a particular country. 

    Hreflang Tags and X Default for International SEO

    But what if a business tries to go global? How would businesses try to target and rank each individual country? And then comes the question of language, and how to show the correct language content to the correct user.

    The Introduction of HrefLang Tags

    Hreflang tags were introduced by Google to help webmasters specify to google the correct version of the website to be shown for the specific type of users, language or location. This was introduced in 2011 and helped users and search engines to serve the right type of content to the right type of users to improve the user experience.

    For example, hreflang tags can be used to serve the specific type of content for English Speaking audiences for both US and UK separately. 

    Here’s a code snippet for an hreflang tag for a user in the UK: 

    Let’s break this up a bit. 

    Rel = “alternate” couple with an hreflang tells google that the following HTML link is an alternate variation of similar pages.

    href = “url link” tells google that the exact URL mentioned in the quote is the URL under observation.

    Implementation of Hreflang Tags

    Hreflang = “en-gb” tells google that the URL within the quotes is the right variation for UK-based users and uk language speakers.

    Lets review another example: 

    This code snippet clearly differentiates and specifies that there are different types of content for different languages, namely Australia, USA and UK. Each correct variation is properly indicated in under the href = “link” element.

    Another reason for using an Hreflang attribute will be if the currency on the specified URL has a different currency, for example, US dollars versus UK pound. In that case, using hreflang tags becomes beneficial in serving the right page to the right type of users.

    Region Codes and ISO Languages

    There are countless SEOs who make the mistake of putting the wrong language and region codes which ultimately confuse Google and does not serve any purpose. 

    For example: the more popular example is of “en-eu”. Check the screenshot below:

    Google supports the ISO 639-1 format for language codes, and you can get more specific by using the ISO 3166-1 Alpha 2 format to signal which region you’re targeting.

    Another common mistake is using “en-uk” instead of  “en-gb” which is the correct variation for UK region.

    Its always best to avoid confusion and generate hreflang tags using a hreflang tag generator.

    Here a popular generator that we recommend. Check the link below: 

    http://www.internationalseomap.com/hreflang-tags-generator/

    The Purpose of X = default and how to use them

    Google introduced the hre lang = “x-default” to serve any user a default page in case its particular location or region-specific href lang attribute has not been specified. This helps search engines display the default page in case it’s not able to figure out the right type of content to show to any user based on his/her search settings.

    Here’s how it looks: 

    In this case, if a user visits the domain from a country let’s say, India, then https://example.com/ is the URL that will be shown to the specific user. Any user coming from countries and languages other than UK, US or Australia will be shown the default URL under the x-default attribute.

    Is X-default Optional or Compulsory?

    X default is definitely not an obligation and you may get away by not having to use them at all. Google systems have evolved a lot in the last few years to the point that they can clearly distinguish and specify the best kind of content to be served to the specific user.

    But yes giving the “X-default” gives you control instead of Google. So that’s a nice thing to have. 

    It is also unlikely that your English language page is going to show up for a Spanish-speaking user searching under the Spanish search settings.

    Ways to Implement the Hreflang Tag

    The following methods can be applied to implementing the hreflang tag for your site.

    • HTTP header of each page
    • XML sitemap
    • Header of the HTML code of each page 

    Implementing Href Lang Tags on HTML Header of the Page

    Out of these using implementing the changes on the HTTP header of the page is the most common and preferred way. Here is a snippet on how its done: 

    Keeping this code snippet between the  <head>…</head> HTML of the pages is the way to implement the hreflang tag on the header of each page.

    Implementing Href Lang Tags on Sitemap

    Here’s how you can implement the same href lang tags on the Sitemap file of the website. 

    Using Hreflang tags in a sitemap is less effective however can be coupled with the first method to ensure proper indexing of hreflang attributes.

    Canonicalization and Href Lang. What is the Difference? 

    The main difference between the Href lang attribute and the canonical attribute is that canonicals distinguish the dominant URL among a set of URLs to be shown in the search. Thus making the less dominant urls “non – indexable”.

    Where href lang attributes specify the correct use of different URLs for different regions and languages based on certain conditions. None of the alternate urls is dominant or recessive, instead, they simply show up in Google under different circumstances and different conditions. 

    And obviously, none of the URLs remains indexable in Google Search, unlike the implementation of Canonical Tags.

    Do HrefLang Tags Really Affect Ranking?

    You won’t notice a difference in ranking after using hreflang and x-default markup, but it is one of Google’s advised best practices, according to John Mueller of Google. The major goal would be to more effectively target your global audience and provide searchers from various locations or who speak various languages with a better user experience. A higher click-through rate, more goal completions, sales, and return on investment (ROI) may result from properly targeting your material to international consumers.

    FAQ

    A hreflang tag is an HTML (or sitemap/header) attribute used to tell search engines which language- and region-specific version of a page should be served to users. It helps avoid showing the wrong language version and reduces duplicate content risks when you maintain multiple regional sites.

    The x-default value signals to search engines that a given page is the fallback version when no specific language/region version is applicable. It’s commonly used on homepages or selector pages for global audiences.

    Use x-default when you have a page that doesn’t target a specific country or language (e.g., a global homepage, country selector page). It ensures users from unspecified locales still land on a relevant version.

    Ideally yes for international targeting: every version (language/region) of a page should include hreflang annotations including self-referencing and linking to other versions. Omission may confuse search engines or mis-serve users.

    Common errors: incorrect language/region codes (ISO standards), missing self-referential tags, inconsistent URLs (redirects/404s), using relative instead of absolute URLs, or placing x-default incorrectly. These issues can nullify benefits.

    No, hreflang or x-default tags are signals for correct audience targeting and user experience rather than ranking boosters. They help ensure the right version is shown, which can lead to better engagement, indirectly supporting SEO.

    Options: add <link rel="alternate" hreflang=".."> tags in the <head>, specify in an XML sitemap, or via HTTP headers. Always use absolute URLs and ensure each version links to every other version including itself.

    The URL chosen for x-default should be the global or non-targeted version of the content (for unspecified users). It could be your root domain home page or a generic selection page. The important part is consistency.

    By specifying a fallback version with x-default, you reduce ambiguity for search engines about which version to serve when language/region isn’t matched—limiting indexing of unwanted duplicates and improving clarity in international setups.

    Use tools like Screaming Frog SEO Spider or the International Targeting report in Google Search Console to identify missing or incorrect tags. Also monitor analytics for user behaviour by region to ensure correct versions are serving. 

    Summary of the Page - RAG-Ready Highlights

    Below are concise, structured insights summarizing the key principles, entities, and technologies discussed on this page.

    International SEO helps businesses target multiple countries and languages, ensuring users see the right content for their region. Hreflang tags, introduced by Google in 2011, specify the correct page version for users based on language and location. By using hreflang tags, businesses can serve region-specific content, such as English pages for the UK and the US, improving user experience and avoiding duplicate content issues.

    Hreflang tags can be implemented in the HTML header, HTTP headers, or XML sitemaps, with the HTML header being the most common method. Proper use of ISO language and region codes is critical to avoid confusing search engines. Common mistakes include incorrect codes, missing self-references, inconsistent URLs, and misplacing the x-default tag. Tools like hreflang tag generators help prevent these errors.

    The x-default attribute provides a fallback page for users from locations without a specified hreflang version. While optional, it gives businesses more control over which page is shown when no specific match exists. X-default ensures users from unspecified regions still land on a relevant page and helps reduce duplicate content issues in multilingual websites.

    Hreflang and x-default tags do not directly boost rankings but enhance user experience by serving the correct regional content, potentially improving engagement and conversions. Best practices include using absolute URLs, linking all language/region versions to each other, testing implementation with tools like Screaming Frog, and monitoring user behavior by region to ensure accuracy. Correct usage supports international SEO by targeting the right audience and improving overall content clarity.

    Tuhin Banik - Author

    Tuhin Banik

    Thatware | Founder & CEO

    Tuhin is recognized across the globe for his vision to revolutionize digital transformation industry with the help of cutting-edge technology. He won bronze for India at the Stevie Awards USA as well as winning the India Business Awards, India Technology Award, Top 100 influential tech leaders from Analytics Insights, Clutch Global Front runner in digital marketing, founder of the fastest growing company in Asia by The CEO Magazine and is a TEDx speaker and BrightonSEO speaker.