Understanding and Fixing Hreflang Errors

What is "Hreflang Errors"?

Hreflang errors are incorrect implementations of the HTML `hreflang` attribute, a technical signal that tells search engines which language and regional version of a webpage to serve to users in different locations. When these errors occur, search engines may show the wrong language or country-specific content to your audience, directly harming user experience and international SEO performance.

For businesses targeting multiple regions, unresolved hreflang errors mean wasted organic search investment and confused potential customers who land on a page not intended for them.

Hreflang Attribute: An HTML tag (link rel="alternate" hreflang="x") used to specify the language and geographical targeting of a webpage.
Self-Referencing Tag: A critical rule where every listed page must include a hreflang tag pointing to itself, or the entire set may be ignored.
Language and Region Codes: Defined using ISO codes (e.g., 'en' for English, 'de' for German, 'en-GB' for English in the United Kingdom).
Bidirectional Links: All pages in a hreflang set must mutually link to each other; it is not a one-way directive.
x-default: A special hreflang value used to specify a default or fallback page for users whose language/region doesn't match any other specified version.
Implementation Methods: Hreflang can be placed in the HTML page header, the HTTP header (for non-HTML files), or within an XML sitemap.
Validation: The process of checking for errors using dedicated crawlers or Google Search Console reports.
Canonical Tags: Must work in harmony with hreflang; each version should point to itself as canonical.

This topic is most critical for marketing managers, SEO specialists, and product teams managing multilingual or multi-regional websites. It solves the problem of unintentionally misdirecting international traffic, which damages credibility and conversions.

In short: Hreflang errors are technical mistakes that prevent search engines from correctly routing global users to their appropriate localised content.

Why it matters for businesses

Ignoring hreflang errors dilutes the ROI of creating localised content, as search traffic is not properly segmented, leading to poor user engagement and lost sales opportunities.

Poor User Experience & High Bounce Rates → A user in France served an English-US page may leave immediately, signaling to search engines your page is irrelevant.
Cannibalisation & Ranking Dilution → Multiple regional pages (e.g., /en-us and /en-gb) compete against each other in search results instead of targeting unique audiences.
Wasted Localisation Budget → Investment in translating content and adapting offers is undermined if the right users never find the correct version.
Damaged Brand Credibility → Showing prices in the wrong currency or terms in the wrong language appears unprofessional and erodes trust.
Ineffective Regional Campaigns → Marketing efforts for a specific country fail because organic search sends users to a generic or different regional page.
Missed Local Search Features → Correct hreflang implementation can help your pages appear in localised search features and knowledge panels.
Compliance Complications → In the EU, serving the wrong language version could conflict with transparency expectations under consumer protection norms, though not directly with GDPR.
Slower International Growth → Search engines cannot efficiently understand and rank your site structure for different markets, stunting expansion.

In short: Hreflang errors directly convert international SEO efforts into a source of friction and lost revenue instead of growth.

Step-by-step guide

Diagnosing and fixing hreflang errors can feel like untangling a web of technical directives, but a systematic approach makes it manageable.

Step 1: Audit your current implementation

The initial obstacle is not knowing the full scope of the problem. Use a technical SEO crawler to scan your site and generate a report of all hreflang tags and their destinations. Simultaneously, check the "International Targeting" report in Google Search Console for direct feedback from Google.

Step 2: Define your target country-language matrix

Avoid creating tags arbitrarily. Map out exactly which language and country versions you have for each piece of content.

List all live locales: e.g., France (fr), Germany (de), Germany (de-de), Switzerland German (de-ch).
Map each piece of content: Ensure every article, product page, and landing page has a defined counterpart in this matrix.

Step 3: Correct your ISO codes

Incorrect codes are a primary source of failure. Use the correct format: language code only (e.g., 'fr') or language-region code (e.g., 'fr-be' for French in Belgium). The language code must be in lowercase, the region code in uppercase.

Step 4: Ensure every page has a self-referencing tag

If a page lists other versions, it must include itself in that list. For example, your example.com/de page must contain a hreflang="de" tag pointing to example.com/de. Missing this invalidates the group.

Step 5: Confirm bidirectional linking

All pages in a declared group must link to all others. If page A links to B and C, then B must link back to A and C, and C must link to A and B. A quick test is to pick a page and verify all its referenced alternates also reference it.

Step 6: Harmonise hreflang with canonical tags

Conflicting signals confuse crawlers. Each regional version should have a self-referencing canonical tag. The canonical URL should be the same page the hreflang tag points to for that version.

Step 7: Implement x-default where appropriate

If you have a generic page (e.g., in English) for all other unspecified languages, use hreflang="x-default". This is not mandatory but is a best practice for better user routing.

Step 8: Choose and consolidate your implementation method

Multiple methods (HTML and XML sitemap) can cause conflicts. For most, implementing via the XML sitemap is cleaner for large sites, while HTML tags are fine for smaller sites. Choose one primary method and ensure it is applied consistently.

Step 9: Re-crawl and validate

After corrections, run the same audit tools from Step 1. Focus on clearing errors like "return tag missing," "invalid language code," and "non-reciprocal links."

Step 10: Monitor in Search Console

Submit your updated XML sitemap if used. The International Targeting report updates slowly; monitor it over the following weeks for a reduction in errors detected by Google.

In short: Fix hreflang by auditing, correctly coding your locale matrix, enforcing bi-directional linking, and aligning with canonical tags.

Common mistakes and red flags

These pitfalls persist because implementation is often delegated without a clear understanding of the relational logic required.

Missing Self-Referencing Tag → Causes an entire group of pages to be ignored. Fix it by ensuring every page with hreflang annotations includes a tag for itself.
Non-Reciprocal (One-Way) Links → Page A points to B, but B does not point back to A. Fix it by treating hreflang as a mutual agreement; audit and create links in both directions.
Incorrect or Non-Standard Language Codes → Search engines may not recognize 'EN' or 'uk'. Fix it by using only lowercase ISO 639-1 language codes and correct ISO 3166-1 Alpha 2 region codes.
Conflicting Hreflang and Canonical Tags → A page pointing to another version as canonical but declaring itself via hreflang creates a conflict. Fix it by making canonical tags self-referential for each version.
Mixing Implementation Methods Inconsistently → Having some tags in HTML and others in an XML sitemap can lead to gaps and conflicts. Fix it by choosing one primary method and auditing to ensure full coverage.
Using Hreflang for Regional Redirects → Hreflang is a suggestion, not a redirect. It does not solve the need for server-side redirects based on IP/location. Fix it by implementing proper geo-targeting logic on the server if automatic redirection is required.
Forgetting the x-default Value → Users from untargeted regions may get a suboptimal experience. Fix it by designating a sensible fallback page (e.g., your US English or international page) with the x-default attribute.
Including Non-200 Status Pages → If a linked alternate page returns a 404 or other error status, the signal breaks. Fix it by ensuring all pages in the hreflang group are live and return a 200 OK status.

In short: Most hreflang mistakes stem from broken relationships between pages, incorrect codes, or conflicting technical signals.

Tools and resources

Selecting tools can be overwhelming, but each category serves a distinct purpose in the hreflang management workflow.

Technical SEO Crawlers — Use these for the initial audit and to uncover implementation errors across your entire site, as they simulate a search engine bot.
Google Search Console — This is essential for validation, as it shows you which errors Google's own systems have detected on your property.
XML Sitemap Generators & Validators — If implementing via sitemap, use these to create correctly formatted sitemaps and check their structure before submission.
ISO Code Reference Lists — Keep an authoritative reference for language and country codes handy to avoid syntax errors during implementation.
Schema Markup Generators — While not for hreflang directly, these tools remind you of the precise syntax needed for meta tags, helping avoid formatting mistakes.
Proxy/VPN Services — Use these to perform quick manual tests from different countries to see which version of your site appears in search results.
Spreadsheet Software — A simple but critical tool for mapping your content matrix and planning the bidirectional link structure before technical implementation.
CMS-Specific SEO Plugins — For common platforms, these can simplify the management of hreflang tags, though they must be configured correctly.

In short: Effective management requires audit crawlers, Google's own tools, reference guides, and careful planning software.

How Bilarna can help

Finding and vetting technical SEO providers who can efficiently diagnose and fix complex internationalisation issues like hreflang errors is a common frustration.

Bilarna is an AI-powered B2B marketplace that connects businesses with verified software and service providers. If your team lacks the internal expertise or time to resolve hreflang errors, you can use Bilarna to find specialised SEO agencies or technical consultants with proven experience in international SEO audits and implementation.

Our platform uses AI matching to align your specific project needs—such as "multilingual site audit" or "hreflang correction"—with providers whose skills and past work are verified through our review and verification programme. This helps you efficiently source reliable external support.

Frequently asked questions

Q: Is hreflang a Google ranking factor?

Hreflang is not a direct ranking factor that makes pages "rank higher." It is a directive that helps Google *serve* the correct regional page from your site in its search results. Correct implementation prevents ranking dilution and improves targeting, which indirectly supports performance.

Q: Do I need hreflang if I use country-code top-level domains (ccTLDs) like .de or .fr?

Yes, it is still highly recommended. While ccTLDs are a strong geo-signal, hreflang provides explicit relational links between your different domain versions. This is especially important if you have similar content in the same language across multiple ccTLDs (e.g., .de and .at for German).

Q: What happens if I have hreflang errors? Will my site be penalised?

Google states there is no manual penalty for hreflang errors. However, the consequence is that Google may ignore your hreflang signals entirely. This leads to poor user experience and internal competition between your pages, which negatively impacts organic performance without a formal penalty.

Q: Can I use hreflang for language-only targeting (without a specific country)?

Yes. Use the language code alone (e.g., hreflang="es" for Spanish). This tells search engines to show this page to users who prefer Spanish, regardless of their location. It is often paired with regional-specific versions (e.g., es-es, es-mx) for a complete strategy.

Q: How long does it take for Google to process corrected hreflang tags?

It depends on how Google discovers the tags. For HTML tags, it can take several weeks as Google recrawls your pages. For corrections in an XML sitemap, processing can be faster once the sitemap is resubmitted and crawled, but you should still allow 2-4 weeks to see updates in the Search Console reports.

Q: What is the single most important rule to check first?

Ensure every page with hreflang annotations has a self-referencing tag. This is the most common critical error that causes an entire set of signals to be disregarded. Fix this before moving on to reciprocal linking or code validation.