Website Translation and Multilingual SEO: What UK Businesses Need to Get Right

Key Takeaways

• Translating a website for a new market is not simply about converting text — it involves keyword research in the target language, hreflang implementation, URL structure decisions, and culturally adapted content, all of which affect whether the translated site actually ranks in that market.
• Machine-translated website content, published without human review, risks Google quality penalties that can suppress rankings across all language versions of the site — not just the translated pages.
• Hreflang tags tell search engines which language version of a page to serve to which user — incorrect or missing hreflang implementation is one of the most common technical errors in multilingual websites.
• Keywords do not translate directly: the search terms used in French, German, or Spanish for the same product or service are often different from a literal translation of the English keyword, and research must be done in the target language.
• URL structure for multilingual sites — whether to use subdirectories, subdomains, or country-code domains — is a strategic decision with long-term SEO implications that should be made before translation begins.

A translated website that no one finds is a significant investment with no return. Website translation and multilingual SEO are two sides of the same project — the content needs to be accurate and natural in the target language, and the technical and keyword infrastructure needs to be in place for search engines to surface it to the right audience in the right market.

Why Machine Translation Alone Is Not Enough

The temptation to use unedited machine translation for website content is understandable — it is fast and cheap. The problem is that machine translation, particularly for marketing and commercial content, produces output that reads as translated rather than written, misses cultural adaptation, and frequently contains errors that erode trust with the target audience.

Beyond the user experience problem, Google Search Central guidance makes clear that automatically generated content — including unedited machine translations — may be treated as low-quality content. Low-quality content on translated pages can affect the performance of the entire domain, not just the individual pages.

Human-reviewed translation — whether a professional translation from scratch or machine translation with post-editing by a native-speaking linguist — produces content that meets quality standards and avoids these risks.

Keyword Research in the Target Language

A common mistake in multilingual SEO is treating keyword research as a translation task. The search terms that drive traffic in English are not always the terms that users in France, Germany, or Spain use to search for the same product or service.

Search behaviour varies by language and market for several reasons:

• The literal translation of an English keyword may not be the term commonly used by native speakers
• Search volume distribution across related terms differs between markets
• Local competitors may have already established strong positions on certain terms, making alternative terms more strategically attractive
• Colloquial terms, abbreviations, and regional variations affect which keywords carry volume in a specific market

Effective multilingual keyword research starts from scratch in each target language, using search data for that market rather than translating the English keyword list.

Hreflang: What It Is and Why It Matters

Hreflang is an HTML attribute that tells search engines which language version of a page is intended for which audience. Correct hreflang implementation ensures that a French-speaking user searching in France sees the French version of your page in search results, not the English version.

Without hreflang tags, search engines may serve the wrong language version to users, or may identify translated pages as duplicate content and suppress them in rankings. Hreflang errors are among the most common technical SEO problems on multilingual websites.

A correctly implemented hreflang setup:

• Specifies the language (and optionally the region) for each page version
• Includes a reciprocal tag on every translated version pointing back to all other versions
• Includes an x-default tag specifying which page to serve when no specific language match is found
• Is implemented consistently across the site — missing tags on some pages create gaps that undermine the overall setup

URL Structure Decisions

Before translation begins, the URL structure for the multilingual site should be decided. The three main options are:

Subdirectories (e.g. example.com/fr/ for French): The most common approach for smaller multilingual sites. All language versions sit within the same domain, sharing its authority. Easier to manage than separate domains and generally recommended for businesses entering new markets without established local brand presence.

Subdomains (e.g. fr.example.com): Technically treated as separate sites by Google, which means they do not automatically benefit from the main domain's authority. Can be appropriate for large-scale operations with dedicated teams per market.

Country-code top-level domains (e.g. example.fr): Strongest signal to search engines that content is specifically for a particular country. Requires separate hosting and maintenance per domain, and building domain authority from scratch for each. Most appropriate for established businesses with significant market presence in the target country.

For most UK businesses translating a website to enter European markets, subdirectories are the recommended starting point.

Content Adaptation Beyond Translation

A translated website performs better when the content is culturally adapted as well as linguistically accurate. Cultural adaptation for website content includes:

• Adjusting examples, case studies, and references to be relevant to the target market
• Adapting calls-to-action and conversion copy to reflect local norms (tone of urgency, use of social proof, formality of address)
• Reviewing imagery and visual content for cultural appropriateness
• Adapting contact information, currency, date formats, and measurement units
• Reviewing legal and regulatory statements for accuracy in the target jurisdiction

A page that reads naturally in the target language but uses UK-specific examples, references British regulatory frameworks, and displays prices in GBP for a French audience will convert less well than one that is adapted throughout.

Conclusion

Website translation for international markets is a technical and linguistic project in equal measure. The content needs to be accurate, natural, and culturally adapted; the technical implementation needs to be correct; and the keyword strategy needs to be built for the target market rather than translated from the English version.

Global LTS provides marketing translation services for website content across 120+ languages, including culturally adapted translation by native-speaking marketing translators. For multilingual typesetting and design file handling, see our InDesign translation and brochure translation services. Contact us to discuss your website translation project.

For related reading, see our guides on marketing translation vs transcreation and how to prepare your marketing materials for translation.