SEO for multilingual websites: why one language doesn't rank as well as the others

SEO for multilingual websites

SEO problems for multilingual websites are a common issue for companies with a presence in several countries: the Spanish website performs well, but the French or English versions generate hardly any visits or customers, even though the content is correctly translated. This is one of the most frequent—and most difficult to diagnose without technical expertise—issues we see in SEO audits of multilingual websites.

Why does it happen?

In most of these cases, the problem isn't the content itself, but how Google interprets the relationship between different language versions of the same website. Each page should explicitly tell Google which other language version it corresponds to. This signal is controlled by tags. hreflang, one of the technical elements of international SEO that is most frequently misconfigured, even on websites managed by professionals.

When hreflang fails or is misconfigured, several problems can occur at once:

• Google shows the wrong language version to users in a specific country.
• Treat different versions of the same page as duplicate content.
• He doesn't fully trust any of the versions, and this penalizes the visibility of all of them.
• Organic traffic is unevenly distributed across languages, with no relation to the actual quality of the content.

The result is always similar: less traffic and fewer conversions in a specific language, even though nothing appears to be wrong while browsing the website. From the outside, everything seems to be working; the problem is only visible in the ranking metrics and actual traffic.

Why simply checking the language plugin isn't always enough

Tools like TranslatePress, WPML, and Polylang manage hreflang automatically, and in most cases, they do their job well. However, this doesn't guarantee correct configuration in all scenarios, especially on websites that have undergone migrations, domain changes, or redesigns over the years.

In the most complex projects we've managed, we've encountered configurations inherited from previous website versions—remnants stored directly in the database, seemingly unrelated to the current plugin configuration—that no admin panel displays, and which continue to confuse Google years after the original change. Detecting this type of problem requires examining the website's internal structure, at the database and code levels, not just how it appears in the visual editor.

How to tell if your website has this problem

Some signs that often indicate an hreflang or multilingual indexing problem:

• One language version receives far fewer organic visits than the others, disproportionately to the size of that market.
• Google Search Console shows indexed pages in a language different from what is expected for a specific region.
• Warnings about duplicate content appear between pages that are actually legitimate translations of each other.

None of these signs is conclusive on its own, but together they usually point in the same direction.

What to do if your multilingual website doesn't perform equally well in all markets

Before investing in more content or advertising campaigns for a market that isn't taking off, it's wise to rule out any underlying technical issues. A technical SEO audit reviews, among other things, the correct implementation of hreflang tags, the actual indexing of each language version in Google Search Console, and any legacy configurations that might be affecting search engine ranking without being immediately apparent.

In Batlle We perform technical SEO audits for multilingual websites, focusing on detecting these types of problems before they continue to drain visibility and potential customers in the markets where growth is most needed.

Frequently Asked Questions

What is hreflang and what is it used for?
It is a technical tag that tells Google which language or region version corresponds to each page of a website, so that it shows the correct version to each user.

Can a misconfigured hreflang tag affect SEO even if the content is well translated?
Yes. The hreflang tag is independent of content quality: even if the translation is excellent, a poorly configured technical signal can prevent Google from ranking it correctly.

How do you detect an hreflang problem?
With a combination of SEO auditing tools, Google Search Console review and, in the most complex cases, direct inspection of the website's code and database.

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