Should you really implement hreflang between completely different languages?

Why can Google forgo hreflang for certain languages?

When two versions of a page are in German and Chinese, the language signals are clear enough for Google to unambiguously identify the target language. The algorithm analyzes the characters, grammatical structure, named entities, and other markers that make the distinction trivial.

Hreflang was designed to remove ambiguity in situations where Google might hesitate between multiple versions. If no confusion is possible, the attribute becomes a technical effort with no real added value for crawling or indexing.

In which cases is hreflang indispensable?

The real utility appears in regional variants of the same language: UK vs US English, French from France vs Canada, Spanish from Spain vs Mexico. The content can be identical or nearly identical, and only hreflang indicates which version to serve to which user.

Another case: pages in closely related but distinct languages, like Norwegian bokmål and nynorsk, or Serbian in Cyrillic vs Latin. Google can guess, but hreflang eliminates the risk of error and improves geographic targeting accuracy.

What does this mean for multilingual architecture?

If your site covers ten very distant languages (Japanese, Arabic, Portuguese, Finnish, etc.), you can lighten the maintenance load by only deploying hreflang on risky pairs. Fewer tags = fewer potential bugs, less technical debt.

But be careful: removing hreflang between distinct languages is only problematic if no other confusion exists. If your URLs are ambiguous, if the content mixes multiple languages on the same page, or if IP geolocation is poorly configured, hreflang remains a safety net.

• Hreflang is a targeting signal, not a technical prerequisite for multilingual indexing
• Google easily distinguishes languages with different scripts (Latin, Cyrillic, Chinese, Arabic…)
• The effort of implementation should be proportionate to the real risk of confusion
• Hreflang errors (loops, broken links, missing x-default) can degrade performance — better to have none than a faulty deployment
• The real complexity lies in regional variants and partially translated content

Is this statement consistent with on-the-ground observations?

Yes, it aligns with what has been observed for years on well-structured international sites. Google has never had trouble differentiating a page in Japanese from a page in German, even without hreflang. Targeting errors almost always occur on closely related variants or hybrid content.

However, this statement can be misleading if generalized too quickly. Some sites mix multiple languages in a single URL (menus, footer, content snippets), which muddles the signals. In these cases, hreflang remains a useful crutch even between distinct languages.

What nuances should be added to this recommendation?

Mueller does not state that hreflang is useless, but that it can be superfluous if Google has no difficulty. The devil is in this "if". On a technical site with clean URLs, a well-defined XML sitemap, and a clear structure, the absence of hreflang between Chinese and German will pose no problem.

On a poorly structured site — non-descriptive URLs, missing or incorrect lang tags, duplicated content between versions — hreflang becomes a patch that compensates for other flaws. It’s better to fix the root problem, but for the moment, hreflang limits the damage.

[To be verified] : Google does not specify how it measures the "difficulty" of distinguishing two versions. No public metrics, no documented threshold. So, we rely on a subjective assessment, complicating the decision for a practicing SEO.

In which cases does this rule not apply?

If you are using hreflang for fine geographic targeting (same language, multiple countries), the attribute retains its relevance. For example, a page in English targeting the UK, the US, Australia, and India: Google needs hreflang to know which version to prioritize based on the user's IP and locale.

Another exception: sites with partial content or fallback. If a page exists in French but some sections remain in English (FAQ, untranslated products), hreflang helps Google understand which version is priority for each audience.

What should you concretely do on an existing multilingual site?

Start by auditing your hreflang declarations in Search Console and via a crawl with Screaming Frog or Oncrawl. Identify pairs of very distinct languages (Latin/Cyrillic, Latin/Chinese, Arabic/Korean…) and check if any targeting errors have been reported on those versions.

If no anomalies appear and your lang HTML tags are correct, you can simplify your implementation: remove hreflang between languages with different scripts, keep it for regional variants. Measure the impact over 3-4 weeks by monitoring impressions and clicks by country in GSC.

What errors should you avoid when removing hreflang?

Never remove hreflang in bulk without prior analysis. Some pages may have mixed content or ambiguous URLs that require the attribute even between distinct languages. A sudden removal can cause localized traffic drops that you won’t detect until later.

Another pitfall: confusing language and country. Hreflang combines the two (fr-FR, fr-CA, en-GB, en-US). If you remove the attribute between French and Chinese but target France and China, you lose the geographic targeting signal — Google could serve the wrong version based on the user's IP.

How can you verify that the absence of hreflang doesn’t hurt your SEO?

Set up specific monitoring in Search Console: segment data by country and language, monitor changes in impressions and CTR. If a language version sees a sudden traffic loss after hreflang removal, immediate rollback.

Also test with VPNs or geolocation simulation tools (BrightLocal, Valentin.app) to verify that Google serves the correct version according to the user's locale. An internal false positive can mask a real user-side issue.

• Audit existing hreflang declarations and identify errors in Search Console
• List pairs of languages with very different scripts (Latin/Cyrillic, Latin/Chinese…)
• Check that lang HTML tags and sitemaps are correctly configured
• Remove hreflang on a sample of test pages, monitor GSC for 3-4 weeks
• Keep hreflang on all regional variants of the same language
• Test geographic targeting via VPN or simulation tools