150+ LANGUAGES · ISO 17100 CERTIFIED · SAME-DAY TURNAROUND
Software and App Localisation Services in London, UK
Software and app localisation services in London, UK: ISO 17100 workflow, 150+ languages, from £30 per page, first translated build in 24–72 hours.
- 150+ Languages
- ISO 17100 Certified
- Same-day Turnaround
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What are software and app localisation services in London, UK?
Software and app localisation services in London, UK translate and culturally adapt software UIs, mobile apps, strings, help content and store listings across 150+ languages under an ISO 17100 workflow, delivered from a single London operations hub from £30 per page.
What types of software and apps can be localised?
Localisable software includes SaaS platforms, iOS and Android mobile apps, enterprise ERP and CRM systems, fintech and banking software, healthtech and MedTech products, edtech and e-learning systems, e-commerce platforms, IoT firmware interfaces and custom in-house tools built on any modern stack.
What services are included in software and app localisation?
Included services are string extraction and internationalisation review, translation by expert linguists, UI and UX localisation, linguistic quality assurance, in-language functional testing, App Store and Google Play metadata localisation, subtitling services for in-app video, and continuous localisation for ongoing releases.
What is the software localisation process step by step?
The software localisation process runs seven steps: scoping and internationalisation audit, string externalisation, pseudolocalisation, translation by expert linguists, linguistic QA and in-context review, functional and layout testing on target devices, and merged release with continuous localisation for subsequent updates.
How do you ensure quality, consistency and cultural accuracy?
Quality, consistency and cultural accuracy are ensured through an ISO 17100 workflow: native in-country linguists translate, a second linguist revises, a project manager runs QA on tags and placeholders, and in-context UI review plus device testing catch layout, plural and cultural issues before release.
How much does software and app localisation cost in London?
Software and app localisation in London is priced in GBP from £30 per page or per 250 source words, with per-word rates varying by language pair, subject complexity and volume; a fixed quote is issued within one working day of receiving the source files.
Complete guide
Everything you need to know
London and UK software teams commissioning localisation buy an engineering discipline, not a document translation. This service line sits inside Professional Translation Services in London, UK and delivers the software and app arm of our wider Website Localization practice from a single London operations hub under an ISO 17100 workflow.
What are software and app localisation services in London, UK?
Software and app localisation services in London, UK translate and culturally adapt software UIs, mobile apps, strings, help content and store listings across 150+ languages under an ISO 17100 workflow, delivered from a single London operations hub from £30 per page. The service line covers SaaS, iOS and Android apps, enterprise ERP and CRM systems, edtech and fintech products across the City, Shoreditch, Canary Wharf, King’s Cross and Bloomsbury.
The London hub also runs delivery for Manchester, Belfast, Edinburgh, Leeds, Nottingham and Birmingham under fixed GBP pricing parity. Every project uses the same ISO 17100 workflow, the same file-format matrix and the same SLA benchmark.
| Attribute | Value |
|---|---|
| Quality standard | ISO 17100 certified workflow |
| Language coverage | 150+ languages |
| Starting price | From £30 per page (GBP) |
| Quote turnaround | Fixed quote within 1 working day |
| First build turnaround | 24–72 hours after SoW approval |
| Delivery model | Single London operations hub |
| SLA benchmark | 1,500–2,000 words per linguist per day |
How does software and app localisation differ from translation?
Software and app localisation adapts strings, dates, currencies, units, right-to-left layouts, plural rules, keyboard shortcuts and cultural imagery for each target locale, while translation only converts source text into a target language. Localisation depends on internationalisation (i18n) — the engineering practice that externalises strings and removes hard-coded formats so the software becomes locale-swappable.
- Translation: converts source text to target language.
- Localisation: adapts UI layout, formats, plurals, icons, colours, legal notices and store metadata.
- Internationalisation: the code-level prerequisite that makes localisation possible.
Right-to-left languages such as Arabic, Hebrew and Urdu need mirrored layouts, flipped icons and reversed navigation flows — covered in detail on our Right-to-Left Language Support for Websites and Apps page.
Who is this London localisation service for?
This service is built for London and UK SaaS product teams, mobile app studios, fintech and healthtech engineering leads, enterprise software vendors and public-sector digital teams that need engineering-literate localisation delivered in GBP under UK contract law. Typical buyers include:
- Fintech engineering teams in Canary Wharf and Shoreditch.
- Healthtech product teams around King’s Cross and MedCity.
- Gov-tech teams across Whitehall.
- Edtech studios in Bloomsbury.
- Mobile app studios shipping to iOS and Android globally.
What types of software and apps can be localised?
Localisable software includes SaaS platforms, iOS and Android mobile apps, enterprise ERP and CRM systems, fintech and banking software, healthtech and MedTech products, edtech and e-learning systems, e-commerce platforms, IoT firmware interfaces and custom in-house tools built on any modern stack. Gaming and multimedia work is handled under our Game Localization practice.
| Product type | Source stack examples | Primary file formats |
|---|---|---|
| SaaS web app | React, Angular, Vue, .NET | JSON, YAML, .resx, XLIFF |
| iOS app | Swift, Objective-C | .strings, .stringsdict, XLIFF |
| Android app | Kotlin, Java | strings.xml, XLIFF |
| Cross-platform | Flutter, React Native | ARB, JSON |
| Enterprise ERP/CRM | .NET, Java | .resx, .properties, .po |
| Static content | Any | CSV, XLIFF 1.2/2.0 |
How is SaaS localisation handled for London platforms?
SaaS localisation for London platforms handles multi-tenant string extraction, in-context editor previews, feature-flagged locale rollout and continuous delivery of new strings on every sprint, so localised builds ship at the same cadence as the English source. This is the modern SaaS default, not an add-on. New strings enter a rolling queue and return as merged pull requests inside the same release train.
How is mobile app localisation handled for iOS and Android?
Mobile app localisation covers iOS .strings and .stringsdict files, Android strings.xml and plurals, Flutter ARB, React Native JSON, App Store and Google Play listings, screenshots, push notifications and in-app purchase copy, tested on device by native linguists. Full coverage of platform-specific plural rules, date and time formats, and dynamic type is documented on our Mobile App Localization hub.
- iOS: .strings, .stringsdict, InfoPlist.strings, XLIFF export from Xcode.
- Android: strings.xml, plurals, resource qualifiers per locale.
- Flutter: ARB with ICU MessageFormat.
- React Native: JSON with i18next or FormatJS.
How is enterprise and custom software localised?
Enterprise ERP, CRM and custom software localisation extracts strings from .resx, .properties, XLIFF and database tables, preserves placeholders and ICU MessageFormat, and returns locale-tested builds ready for staging deployment. Legacy code paths, hard-coded strings and mixed-encoding databases are surfaced during pseudolocalisation before real translation begins.
What services are included in software and app localisation?
Included services are string extraction, internationalisation review, translation by expert linguists, UI and UX localisation, linguistic quality assurance, in-language functional testing, App Store and Google Play metadata localisation, subtitling services for in-app video, and continuous localisation for ongoing releases. Multilingual UI design work links across to our Multilingual UX Design for Localised Websites practice.
- Internationalisation audit and String Externalization review.
- Translation and cultural adaptation by native, in-country expert linguists.
- UI/UX localisation covering layout, truncation and RTL mirroring.
- Linguistic quality assurance (LQA) and in-context review.
- Functional QA and on-device testing.
- Store metadata localisation and screenshot capture.
- Subtitling services for onboarding and tutorial video.
- Continuous localisation via CI/CD integration.
Do you localise app store listings and metadata?
App store listings and metadata are localised for every target market: title, subtitle, keywords, description, promotional text, screenshots and what’s-new notes are translated and keyword-researched per locale to lift App Store and Google Play conversion. Per-locale keyword research and store-page A/B testing sit inside our App Store Optimization service.
Do you handle in-app video subtitling and voice?
In-app video subtitling services cover onboarding walkthroughs, tutorials and marketing clips in SRT, VTT and burned-in formats, with optional voice-over recorded by native talent for markets where subtitles under-perform. Deliverables sync to the localised UI copy for terminology consistency across text and audio.
How it works
What is the software localisation process step by step?
1
How do you order software and app localisation in London?
To order, share your source files or repo access (XLIFF, JSON, .strings, .resx, or a GitHub link), specify target languages and deadline, receive a fixed GBP quote from £30 per page within one working day, approve the SoW, and see the first translated build inside 24–72 hours. Kick-off meetings are offered in person across the City, Shoreditch and Canary Wharf, or over video for UK-wide clients.
2
Can you work with existing development workflows and file formats?
The localisation team plugs into existing Git, GitHub, GitLab, Bitbucket, Jira and Jenkins workflows and processes XLIFF 1.2 and 2.0, JSON, YAML, .strings, .stringsdict, strings.xml, .resx, .properties, .po, ARB and CSV without changing your build pipeline.
| File format | Typical stack |
|---|---|
| XLIFF 1.2 / 2.0 | Universal interchange |
| .strings, .stringsdict | iOS (Swift, Objective-C) |
| strings.xml | Android (Kotlin, Java) |
| ARB | Flutter |
| JSON | React, Angular, Vue, React Native |
| YAML | Rails, Symfony, static site generators |
| .resx | .NET, C# |
| .properties | Java, Spring |
| .po | gettext, WordPress, Django |
| CSV | Legacy exports, spreadsheets |
How it works
How do you ensure quality, consistency and cultural accuracy in the localisation workflow?
1
Can you guarantee that tags and placeholders are preserved?
Tags, placeholders, ICU MessageFormat variables and HTML entities are preserved automatically by the CAT tool’s tag-lock and validated by an automated QA pass before delivery, so no build breaks on merge. Variable order is adjusted per language where grammar requires, without altering the underlying token.
2
Can you work with AI-generated translations or existing localisation memory?
Existing translation memory, termbases and AI-generated output are accepted as input: memories are cleaned and aligned, MT output is upgraded through full post-editing by native linguists to reach quality indistinguishable from human translation. Legacy TMs from any CAT tool are imported in TMX; termbases in TBX or CSV.
Pricing
How much does software and app localisation cost in London?
Software and app localisation in London is priced in GBP from £30 per page or per 250 source words, with per-word rates varying by language pair, subject complexity and volume; a fixed quote is issued within one working day of receiving the source files.
| Deliverable | Price anchor (GBP) | Turnaround |
|---|---|---|
| Single certified page | From £30 | 24 hours |
| 5,000-word UI pack | Volume-tiered per-word rate | 3 working days |
| Same-day rush (up to 10,000 words) | +25–50% surcharge | Same day |
| Continuous localisation (per sprint) | Retainer or per-word | Rolling |
What drives the price of a localisation project?
Price drivers are word count after translation memory leverage, number of target languages, file-format complexity, engineering effort for string externalisation, in-context QA hours, device testing scope and turnaround urgency, with same-day rush carrying a 25–50% surcharge.
How do translation memory and repetitions reduce cost?
Translation memory stores previously approved segments and applies fuzzy-match discounts on repeats and near-matches, so the second release of a product typically costs 40–70% less per word than the first localisation pass. Volume tiers apply on top for word counts above 10,000 per language.
How long does software and app localisation take under the workflow?
Turnaround follows a 1,500–2,000 words-per-linguist-per-day ISO 17100 benchmark: a single certified page is ready in 24 hours, a 5,000-word UI pack in 3 working days, and same-day rush handles up to 10,000 words at a 25–50% surcharge, with the first translated build inside 24–72 hours. Parallel linguists per language scale throughput linearly for larger UI packs.
Do you offer continuous localisation for ongoing software updates?
Continuous localisation runs on a repo webhook: new or changed strings trigger a TMS pull, expert linguists translate in a rolling queue, pseudolocalisation and QA validate the build, and a merged pull request delivers localised strings back to the source branch on every sprint. This CI/CD pattern is a gap left by most UK software translation agencies and is the modern SaaS default.
- Developer commits new or changed strings to the source branch.
- Repo webhook notifies the TMS.
- TMS pulls the delta and routes to the linguist queue.
- Native linguist translates; second linguist revises.
- Pseudolocalisation and automated QA validate placeholders and layout.
- Merged pull request returns localised strings to the source branch.
Can you integrate localisation into our CMS or app?
Localisation integrates into headless CMS platforms (Contentful, Strapi, Sanity), monolith CMS (WordPress, Drupal), and app repos via REST API, CLI or native connectors, so content authors keep writing in English while translations arrive in-place. Full connector coverage is documented on our Connector Integrations page.
Why us
What are the benefits of localising software and apps for London businesses?
Benefits are higher conversion in non-English markets, App Store and Google Play ranking uplift per locale, reduced support tickets from clearer native UI copy, faster international sales cycles, regulatory compliance in markets that mandate local-language interfaces, and a defensible competitive edge for London SaaS exporters.
- Reach the 75%+ of global internet users who prefer content in their native language.
- Lift App Store and Google Play conversion per locale through localised metadata.
- Reduce support ticket volume from clearer native UI copy.
- Meet regulatory language mandates in markets such as France, Quebec and the UAE.
- Shorten enterprise sales cycles by delivering native-language demos and docs.
What factors should you consider when choosing a software and app localisation company in the UK?
Weigh seven factors: ISO 17100 accreditation, engineering-literate linguists, published GBP pricing, file-format and repo-workflow support, in-country native reviewers, transparent SLAs on turnaround, and continuous-localisation capability for post-launch releases.
- ISO 17100 accreditation covering every project, not a subset.
- Engineering-literate linguists who read code and understand placeholders.
- Published GBP pricing anchored to page or 250-word units.
- File-format matrix covering XLIFF, JSON, .strings, .resx, ARB and CSV.
- In-country native reviewers per target locale.
- Written SLAs on quote and delivery turnaround.
- Continuous localisation for ongoing releases, not one-off packs.
Why choose a London-based localisation specialist?
A London-based localisation specialist gives UK buyers on-shore contract law, GBP invoicing, GMT-hour project management, in-person kick-off meetings across the City, Shoreditch and Canary Wharf, and a single operations hub that also serves Manchester, Belfast, Edinburgh, Leeds, Nottingham and Birmingham under the same ISO 17100 workflow. Data handling aligns to UK GDPR and the Data Protection Act 2018, with UK-hosted storage.