7 Technical SEO Issues to Check on Multilingual Websites
Multilingual websites help businesses reach audiences who speak different languages and live in different regions. However, managing multiple language versions can introduce technical SEO challenges that affect crawling, indexing and search visibility. Tools such as Google Search Console and Screaming Frog SEO Spider can help identify issues across a website’s different versions. Mercadeo encourages businesses to build a practical SEO strategy that supports discoverability, relevant content and a better user experience. Understanding technical SEO for multilingual websites helps teams identify problems before they affect important pages.
1. Check Hreflang Tags for Accuracy
Hreflang annotations help search engines understand which language or regional version of a page is intended for a particular audience.
For example, a website may have separate English-language pages for different regions and another version in French. Incorrect hreflang values can make these relationships unclear.
Review the following:
- Use valid language and, where needed, regional codes.
- Ensure each page references its relevant language alternatives.
- Check that alternate URLs are accessible and point to the correct pages.
- Confirm that reciprocal hreflang references are implemented correctly.
- Include a self-referencing hreflang entry where appropriate.
Hreflang helps search engines understand page relationships, but it does not guarantee that a particular URL will appear for every relevant user.
2. Review Language and Regional URL Structures
Multilingual websites can use subdirectories, subdomains or separate country-code domains to organise their content. Each approach has different management and technical implications.
For example, a company might use /fr/ for French content and /de/ for German content. A clear structure helps users and search engines understand how the website is organised.
Check that each language version uses consistent URLs and that translated pages are not accidentally published under the wrong language path. Avoid creating unnecessary URL variations that lead to duplicate or confusing versions of the same page.
3. Identify Duplicate and Near-Duplicate Content
Some similarities across language versions are expected, especially for product specifications, company details or legal information. However, duplicated pages within the same language can create unnecessary complexity.
Review pages that differ only slightly, including those with inconsistent regional information, identical metadata or incomplete translations.
Where regional versions target genuinely different audiences, make their differences useful and clear. Adapt examples, terminology, prices, contact details and service information where appropriate rather than relying on automated translation alone.
Use canonical tags carefully. A translated page should generally have a canonical URL that points to itself when it is a distinct page intended to be indexed, rather than automatically canonicalising every language version to one default-language URL.
4. Verify XML Sitemaps for Each Important URL
XML sitemaps help search engines discover important URLs, although submitting a URL does not guarantee indexing.
Check that sitemaps contain the intended canonical URLs and exclude pages that should not be indexed. Review whether translated pages are included and whether the sitemap structure remains manageable as the website grows.
If hreflang annotations are implemented through XML sitemaps, validate their syntax and alternate URL relationships. Keep sitemap entries aligned with the site’s current URL structure and remove obsolete URLs after migrations or major updates.
5. Check Internal Links Between Language Versions
Internal links should help users navigate to the appropriate content. A French article that repeatedly links to unrelated English pages may create a poor experience for French-speaking visitors.
Review navigation menus, footer links, breadcrumbs and contextual links across language versions. Confirm that links point to the intended translated page when an equivalent exists.
Also check for broken links, redirect chains and links that unintentionally send visitors to the default language. Language switchers should make it easy to reach an equivalent page when available, while avoiding misleading redirects.
6. Audit Indexing and Crawlability
Not every language version will necessarily be indexed, even when it is included in a sitemap. Review important URLs using Google Search Console and crawl tools to identify technical barriers.
Check for:
- Accidental noindex directives.
- Robots.txt rules blocking important resources or pages.
- Incorrect canonical tags.
- Redirects pointing to the wrong language version.
- Server errors and soft 404 responses.
- Pages discovered by search engines but not indexed.
Prioritise commercially important pages first, then investigate patterns affecting entire language folders or templates. This can reveal whether the problem is isolated or caused by a wider implementation issue.
7. Test Mobile Experience, Page Speed and Language Switching
A multilingual page should remain usable across devices and screen sizes. Large translation files, unoptimised images, slow scripts or inconsistent templates can affect page performance.
Test representative pages from each language version rather than checking only the homepage. Review loading performance, layout stability, navigation, translated form labels and the behavior of language-switching controls.
Also confirm that the selected language remains consistent as users move between pages. Do not automatically redirect users solely based on their IP address in a way that prevents them from accessing other versions.
Final Thought
Managing multilingual SEO requires more than translating website content. Correct hreflang annotations, clear URL structures, appropriate canonical tags, reliable internal links and consistent indexing controls all help search engines understand the relationship between language versions. Regular audits using Google Search Console and crawling tools can help teams identify technical problems and prioritize fixes. By following a structured approach to technical SEO for multilingual websites, businesses can create a more accessible and organized search experience for different audiences. Mercadeo can help businesses align technical SEO improvements with their wider digital marketing goals.
About The Author
