150+ LANGUAGES · ISO 17100 CERTIFIED · SAME-DAY TURNAROUND
Professional Website Localisation Services
Professional website localisation services in London: ISO 17100-certified translation, multilingual SEO, and CMS-integrated localisation across 150+ languages from £0.18/word.
- 150+ Languages
- ISO 17100 Certified
- Same-day Turnaround
- Native Translators
Get a free, no-obligation quote
What we do
Explore our services
What are professional website localisation services?
Professional website localisation services are ISO 17100-certified language solutions that translate and culturally adapt a website’s copy, metadata, images, code strings, currency, and user experience for target locales, delivered by qualified human linguists with AI-assisted workflows for UK and global businesses.
What is the difference between website translation and website localisation?
Website translation converts source text into a target language word-for-word, while website localisation additionally adapts cultural references, currency, date formats, images, UX, legal notices, and SEO metadata so the site feels native to each target market rather than translated.
Why is website localisation important for global growth?
Website localisation drives global growth because 76% of online shoppers prefer to buy in their native language, localised sites achieve higher conversion rates, and multilingual SEO opens organic traffic in target markets that English-only sites cannot reach.
What content on a website needs to be localised?
9 content layers need localisation: on-page copy, SEO metadata, alt-text, UI strings, legal and privacy notices, marketing media, product data, structured data (hreflang, schema), and transactional emails triggered by the site.
How much do professional website localisation services cost in the UK?
Professional website localisation in the UK starts from £0.18 per source word, with small business projects between £500 and £2,500, mid-size sites £2,500 to £8,000, and enterprise localisation exceeding £15,000 — 2025 rates from ISO 17100-certified UK agencies.
How do professional website localisation services support multilingual SEO?
Professional localisation supports multilingual SEO by localising target keywords, translating metadata and schema, configuring hreflang and canonical tags, adapting URL structures, and building locale-specific internal links so each language version ranks natively in Google’s regional indexes.
Complete guide
Everything you need to know
UK and international businesses expanding into new markets need a website that reads, ranks, and converts natively in each locale. Our Professional Translation Services in London UK deliver ISO 17100-certified website localisation, multilingual SEO, and CMS-integrated deployment across 150+ languages, priced in GBP and handled under UK GDPR.
What are professional website localisation services?
Professional website localisation services are ISO 17100-certified language solutions that translate and culturally adapt a website’s copy, metadata, images, code strings, currency, and user experience for target locales, delivered by qualified human linguists with AI-assisted workflows for UK and global businesses. The service unifies translation, cultural adaptation, multilingual SEO, and CMS engineering under one accountable workflow. Every project passes a translator plus a reviser under the ISO 17100 two-linguist rule. Coverage spans 150+ languages from a London base. For the definitional deep-dive, see What is website localization and why is it important?.
Which components of a website get localised?
Localisation covers 8 core components: source copy, SEO metadata, image and video assets, code strings and UI labels, legal notices, payment and currency formats, date and address formats, and structured data such as hreflang and schema. Each component carries a distinct risk if left un-adapted.
- Source copy — page body, headings, CTAs adapted for tone and register.
- SEO metadata — title tags, meta descriptions, Open Graph tags in the target language.
- Media — hero images, alt-text, video subtitles, voiceover.
- Code strings — UI labels, error messages, form validation text.
- Legal notices — privacy, cookies, terms per jurisdiction.
- Currency and dates — GBP, EUR, USD; DD/MM/YYYY vs MM/DD/YYYY.
- Address formats — postcode structure, region names, telephone codes.
- Structured data — hreflang, canonical, schema markup per locale.
Technical readiness for locale switching starts with Internationalization — the code-side prerequisite that lets translated strings, dates, and currencies render correctly.
Who delivers professional website localisation in the UK?
Professional website localisation in the UK is delivered by ISO 17100-certified agencies pairing London-based project managers with in-country native linguists, localisation engineers, and multilingual SEO specialists under a single accountable workflow. Our teams work from London (City of London, Westminster, Mayfair, Canary Wharf) and coordinate native linguists across the target markets. Each project has a named localisation manager, a translator, a reviser, and an engineer.
What is the difference between website translation and website localisation?
Website translation converts source text into a target language word-for-word, while website localisation additionally adapts cultural references, currency, date formats, images, UX, legal notices, and SEO metadata so the site feels native rather than translated. Translation is one input; localisation is the full commercial adaptation. For the standalone answer, see What is the difference between website translation and website localization?.
Website translation vs website localisation: comparison table
The table below compares translation and localisation across 7 dimensions — scope, linguists, cultural adaptation, SEO handling, technical assets, QA, and typical UK price band — so buyers can scope the right service.
| Dimension | Website translation | Website localisation |
|---|---|---|
| Scope | Text conversion only | Copy + metadata + media + code + UX + legal |
| Linguists | Translator | Translator + reviser (ISO 17100) |
| Cultural adaptation | None | Imagery, colour, tone, symbols adapted |
| SEO handling | Meta text translated | Keyword localisation, hreflang, localised URLs |
| Technical assets | Body copy | Code strings, schema, sitemaps, forms |
| QA | Linguistic review | Linguistic + in-browser + functional QA |
| Typical UK price band | £500–£3,000 | £2,500–£15,000+ |
When does a website need localisation, not just translation?
A website needs full localisation when it sells or transacts, uses culturally loaded imagery, targets regulated markets (EU, MENA, APAC), or competes on organic search. Translation alone cannot adapt currency, hreflang, legal notices, or local buying behaviour. E-commerce, SaaS, healthcare, and legal sites always require localisation.
Why is website localisation important for global growth in new markets?
Website localisation drives global growth because 76% of online shoppers prefer to buy in their native language, localised sites achieve higher conversion rates, and multilingual SEO opens organic traffic in target markets that English-only sites cannot reach. A localised website turns a passive brochure into a locally competitive channel.
How does localisation improve conversion in new markets?
Localisation improves conversion by removing 4 buyer frictions:
- Language uncertainty — native copy lifts trust signals for the local audience.
- Currency mismatch — GBP, EUR, USD shown natively raises checkout completion.
- Unfamiliar payment methods — SEPA, iDEAL, Alipay adapted per region.
- Culturally off-key imagery — hero visuals adapted to the target audience.
Each friction removed measurably lifts add-to-cart and form-submission rates in the target locale.
What is the commercial impact for UK exporters?
For UK exporters, a localised site unlocks EU, GCC, and North American markets where English-only pages under-rank, under-convert, and under-comply with GDPR-equivalent regulations. Localisation moves from cost centre to revenue channel once organic traffic and native checkout combine. UK GDPR and the Data Protection Act 2018 apply on the UK side; jurisdiction-specific rules apply per target market.
What content on a website needs to be localised?
9 content layers need localisation: on-page copy, SEO metadata, alt-text, UI strings, legal and privacy notices, marketing media, product data, structured data (hreflang, schema), and transactional emails triggered by the site. Every layer carries commercial or regulatory weight. For the full framework, see Key Elements of Website Localization: The Complete UK Framework and What are the key elements of website localization?.
Which text assets need human localisation?
Human localisation is required for marketing copy, legal notices, product descriptions, and brand-critical UI labels. These carry cultural nuance, regulatory risk, and conversion weight that machine translation alone cannot resolve. A native translator adapts idiom, register, and buyer voice.
Which media and design assets need adapting?
Media and design assets requiring adaptation include hero images, iconography, colour palettes, video subtitles and voiceover, and infographics. Visual meaning shifts across cultures — colour symbolism, gesture, and reading direction all change. Print collateral and PDFs are covered by InDesign Localization; audiovisual work is covered by Media Localization. Layout, direction (LTR/RTL), typography, and payment icons are covered by Multilingual UX Design for Localised Websites.
Which technical and SEO assets get localised?
Technical and SEO assets localised include hreflang tags, canonical URLs, localised slugs, XML sitemaps per locale, schema markup, and structured data. Each language version becomes discoverable and non-cannibalising in Google’s index. Getting these wrong dilutes ranking; getting them right compounds organic reach.
Pricing
How much do professional website localisation services cost in the UK?
Professional website localisation in the UK starts from £0.18 per source word, with small business projects between £500 and £2,500, mid-size sites £2,500 to £8,000, and enterprise localisation exceeding £15,000 — 2025 rates from ISO 17100-certified UK agencies. See How much does website localization cost in London? and How Much Does A Certified Translation Cost? for the certified segment breakdown.
| Project tier | Scope | GBP band (2025) |
|---|---|---|
| Per-word baseline | Human translation with revision | From £0.18 / source word |
| Small business | Under 15,000 words, 1–2 languages | £500 – £2,500 |
| Mid-size | 15,000–50,000 words, 3–5 languages, CMS integration | £2,500 – £8,000 |
| Enterprise | 50,000+ words, 5+ languages, TMS + continuous localisation | £15,000+ |
| Certified segment | Legal notices, contracts | From £30 / page |
| Same-day rush | Up to 10,000 words | +25–50% surcharge |
What drives website localisation pricing?
6 factors drive localisation pricing:
- Source word count.
- Number of language pairs.
- Subject-matter complexity (legal, medical, technical).
- CMS or proxy integration scope.
- Certification requirements.
- Turnaround urgency.
Each shifts the £/word rate up or down from the £0.18 baseline.
How do UK per-word rates compare to per-page and project pricing?
Per-word rates from £0.18 govern volume translation. Per-page rates from £30 apply to certified segments such as contracts and legal notices. Fixed project bands (£500–£15,000+) apply to full localisation scopes including engineering, QA, and multilingual SEO.
What surcharges apply to rush and same-day localisation?
Same-day rush localisation handles up to 10,000 words at a 25–50% surcharge over standard rates. The surcharge covers weekend, overnight, and parallel-linguist scheduling required to compress a 3-day turnaround into 24 hours.
How do professional website localisation services support multilingual SEO?
Professional localisation supports multilingual SEO by localising target keywords, translating metadata and schema, configuring hreflang and canonical tags, adapting URL structures, and building locale-specific internal links so each language version ranks natively. See Multilingual SEO, SEO Translation, and How does website localization help with international SEO?.
What is keyword localisation and why does word-for-word translation break SEO?
Keyword localisation is native-linguist research to identify the terms real buyers search in the target locale. Word-for-word translation of English keywords produces low-volume, off-intent phrases that fail to rank. A native SEO linguist rebuilds the term list from local search data. See Keyword Localization.
How is hreflang configured for a localised UK website?
Hreflang is configured with an ISO 639-1 language code plus ISO 3166-1 region code (e.g. en-GB, fr-FR, es-MX) on every page variant. Every locale version cross-references all others to prevent duplicate-content dilution and mis-served regional pages. Self-referencing tags close the loop.
How it works
How do professional website localisation workflows and localisation technology work?
1
What is a translation management system (TMS)?
A translation management system centralises source content, translation memory, terminology databases, linguist assignments, and QA checks in one platform. Reusing previously approved segments cuts duplicate translation cost and enforces terminology across the site. The TMS serves translators, developers, and localisation managers as the single source of truth.
2
Translation proxy vs CMS connector vs API: which delivery model fits?
Choose a translation proxy for fast launch without CMS changes, a connector for native multilingual CMS control, or an API for continuous localisation of high-frequency releases. Each model trades setup cost against long-term SEO ownership.
| Model | Setup speed | SEO ownership | Best fit |
|---|---|---|---|
| Translation Proxy | Fastest (weeks) | Lower (served via proxy domain) | Fast market entry, no dev capacity |
| Connector Integrations | Medium (4–8 weeks) | Full (native CMS pages) | WordPress, Drupal, Shopify multilingual builds |
| API-fed continuous localisation | Longest (dev-led) | Full and automated | SaaS, e-commerce with frequent releases |
3
What is continuous localisation and when does it apply?
Continuous Localization is an automated pipeline that pushes new or changed source strings to linguists whenever code or copy ships. It applies to SaaS products, e-commerce catalogues, and news sites where daily updates make batch translation uneconomical.
Can AI be used for professional website localisation?
AI is used inside professional website localisation as machine translation with human post-editing, terminology enforcement, and QA automation. AI accelerates throughput 3–5x on UI strings, help content, and catalogue data. Human linguists retain final control on legal, marketing, and brand-critical copy. AI translation tools augment the workflow; they do not replace the ISO 17100 reviser.
When is machine translation with post-editing the right choice?
Machine translation with full post-editing fits high-volume, low-risk content — UI strings, help articles, product specifications, user-generated content — where speed and cost matter more than stylistic nuance. A qualified linguist performs full post-editing so the output reads indistinguishably from human translation. This hybrid cuts cost 30–50% versus pure human translation on suitable content.
When must human linguists lead the localisation?
Human linguists must lead localisation of legal notices, medical and regulated content, brand marketing, and SEO landing pages. These carry compliance risk, cultural nuance, and conversion weight that AI cannot reliably deliver alone. Every human linguist works under an NDA-grade confidentiality agreement.
How does AI translation integrate with ISO 17100 quality?
AI translation integrates with ISO 17100 as a productivity layer feeding the translator step. The standard’s required reviser step remains a qualified human. The two-linguist quality floor holds regardless of how much AI accelerates the first pass. Machine learning is also applied to translation memory leverage and quality estimation across the localisation project.
Trusted & certified
How do you choose the best website localisation service or platform?
Choose the best website localisation service on 7 criteria: ISO 17100 certification, native in-country linguists, multilingual SEO capability, CMS/proxy integration, transparent GBP pricing, GDPR-compliant data handling, and a documented QA process with same-day rush capacity. Score each shortlisted localisation service provider against all seven.
- ISO 17100 — translation process quality, two-linguist rule.
- ISO 9001 — project management quality.
- ISO 27001 — information security.
What are the top professional website localisation companies?
The top website localisation companies combine ISO 17100 certification, in-country linguists, TMS technology, and multilingual SEO. The market includes large global providers such as Lionbridge alongside specialist UK-based ISO 17100-certified agencies serving London and the wider UK export market. Match the localisation partner to project size, budget, and industry.
Global platforms vs UK-based localisation agencies: which suits UK exporters?
Global platforms suit multinational enterprises with in-house localisation managers and dedicated budgets. UK-based ISO 17100 agencies suit UK exporters needing GBP pricing, London-hours project management, GDPR-native handling, and same-day certified segments alongside the localisation scope.
What are the professional website localisation services we deliver in London and the UK?
We deliver 10 professional localisation services from London: website localisation, Software & App Localization, multilingual SEO, keyword localisation, media localisation, InDesign localisation, continuous localisation, translation proxy deployment, connector integrations, and SEO translation. All are delivered under ISO 17100 with GDPR-compliant handling. See also the sibling landing page Website Translations Services London.
How does our website localisation process work end-to-end?
The end-to-end website localisation process runs 6 stages:
- Scoping and GBP quote against word count and language pairs.
- Source extraction and translation memory setup in the TMS.
- Human translation by native linguists, AI-assisted where suitable.
- ISO 17100 revision by a second qualified linguist.
- In-browser localisation QA including layout and functional checks.
- CMS or proxy publishing with hreflang and analytics verification.
What turnaround should you expect for a website localisation project?
Expect 1,500–2,000 words per linguist per day under ISO 17100. A 10,000-word site page-set completes in 5–7 working days per language pair. Same-day handles up to 10,000 words at a 25–50% surcharge with parallel linguists. For sizing guidance, see How long does it take to localize a website for a new market?.
How do we handle GDPR and UK/EU regulatory compliance in localised sites?
We handle GDPR by localising privacy policies, cookie notices, and consent flows per target jurisdiction, encrypting source content in transit and at rest, applying NDA-grade linguist confidentiality, and documenting data-processing steps for the client’s DPO. UK GDPR and the Data Protection Act 2018 govern our own handling; equivalent rules apply per target market.
What we offer
How do you scope a professional website localisation project — and get a quote?
Scope a website localisation project by counting source words, listing target languages, identifying CMS and asset types, flagging certified or regulated content, and confirming SEO scope. Request a GBP quote against the £0.18/word baseline and the project bands above.
- Source URL or word count.
- Target language list.
- CMS and hosting stack.
- Deadline and rush requirement.
- Any certified or regulated content requiring ISO 17100 sign-off.
Frequently asked questions
What languages are most important for website localization for UK businesses?
For UK businesses, the most commercially important languages for website localisation are French, German, Spanish, Mandarin Chinese, Arabic, and Polish. Europe remains the primary export market for most UK companies, making EU languages a priority, while Arabic and Mandarin open access to high-growth markets in the Middle East and Asia-Pacific. Polish is particularly relevant given the UK’s large Polish-speaking community. A professional translation agency in London can advise on language priority based on your target markets, audience demographics, and sector — for example, legal or financial services firms often prioritise Japanese and Korean alongside European languages.
How do I choose a website localization service in London?
Choose a website localisation service in London that combines certified translators with proven technical expertise in web content management systems (CMS) such as WordPress, Drupal, or Shopify. Look for agencies that employ native-speaker linguists with subject-matter specialisation relevant to your industry — whether legal, technical, medical, or e-commerce. Key credentials to verify include ISO 17100 certification for translation services, experience with transcreation and cultural adaptation, and a transparent quality assurance process. Ask for case studies, references, and a sample localisation review before committing to a full project.
What are the most common website localization mistakes to avoid?
The most common website localisation mistakes include direct word-for-word translation that ignores cultural context, failing to localise images, currencies, date formats, and units of measurement, and neglecting SEO keyword research in the target language. Many businesses also overlook text expansion — translated content can be 20–30% longer than English, breaking page layouts. Other frequent errors include using machine translation without human post-editing for customer-facing content, and failing to test the localised site with native-speaking users before launch. Working with a professional translation agency ensures these technical and linguistic pitfalls are systematically addressed.
How is cultural adaptation handled in website localization?
Cultural adaptation in website localisation goes beyond translation to ensure your content, tone, imagery, and user experience resonate with the target audience’s values and expectations. A professional agency will review colour symbolism, idiomatic expressions, humour, and culturally sensitive references — for instance, certain gestures or colour choices carry different meanings across markets in the Middle East, Asia, and Latin America. This process, known as transcreation, may involve rewriting marketing copy rather than translating it directly. Native-speaking linguists with in-country experience are essential for delivering culturally authentic localisation that builds trust with local audiences.