ISO 17100 CERTIFIED · SAME-DAY TURNAROUND · 20+ YEARS
Media Localization vs Media Translation: What Is the Difference?
Media translation converts spoken and on-screen language; media localization additionally adapts culture, imagery, units, currency, timing and compliance for each target market.
- ISO 17100 Certified
- Same-day Turnaround
- 20+ Years
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What we do
What is the difference between media localization and media translation?
Media translation converts spoken dialogue and on-screen text from a source language into a target language, while media localization additionally adapts timing, imagery, units, currency, cultural references, on-screen graphics and regulatory disclaimers so the finished video, audio or game feels native to the target market rather than translated.
How it works
How do media translation and media localization compare side by side?
Media translation and media localization differ across 7 dimensions: scope, deliverables, reviewer profile, timeline, indicative cost, best-fit content and UK regulatory fit.
What’s included
How does the double-translation drift problem affect media localization?
Double-translation drift occurs when a Japanese, Korean or Turkish source is first localized into English and then translated into other European languages from that English master, compounding interpretive shifts twice and diluting the original creative intent — UK studios avoid this by commissioning source-language-direct pivots.
Complete guide
Everything you need to know
Media translation converts the language track; media localisation rebuilds the entire audiovisual experience for a target market. For UK-facing broadcast, streaming, game and corporate content, choosing correctly between the two is what separates a compliant launch from a costly rework, and this page draws the boundary under ISO 17100 from London.
What is media translation?
Media translation is the linguistic conversion of the language track inside audiovisual content — dialogue, narration, subtitles, captions and on-screen text — from a source language into a target language. It runs under ISO 17100 TEP workflow with 3 different qualified linguists, from £30 per certified page, as part of our Language Translation Services in London and the UK.
- Film and TV dialogue scripts.
- Corporate and e-learning video narration.
- Podcast and radio audio.
- Video-game text strings.
- Streaming subtitle files.
- On-screen graphic captions.
What we offer
What is media localization?
Media localisation is the end-to-end adaptation of video, audio, game and streaming content for a target market, layering cultural, visual, timing, unit, currency and regulatory adjustments on top of translation. The finished piece reads as native, not translated. It is the superset — translation is one required sub-step within it.
- Currency conversion (GBP to target).
- Metric or imperial unit swaps.
- Date and time format adjustments.
- On-screen graphic re-rendering.
- Cultural reference replacement.
- Timing and lip-sync adjustment.
- Regulatory disclaimers (ASA, BBFC, PEGI).
- Access-services compliance (Ofcom subtitling, signing, audio description).
Why is media localization the commercially correct choice for most UK-facing projects?
Media localisation is the commercially correct choice for most UK-facing projects because distribution channels, regulatory bodies and audience expectations collectively impose format, access-services and cultural requirements that translation alone cannot satisfy. Ofcom-licensed broadcast, SVOD platforms, PEGI-rated games and ASA-regulated advertisements each convert a translation brief into a localisation brief before a single frame reaches the audience. Buyers who commission translation when localisation is required do not save money — they pay for rework.
How do Ofcom, ASA and BBFC rules push projects from translation into localization?
UK regulatory bodies impose four categories of non-negotiable adaptation that sit outside the scope of linguistic translation:
- Ofcom — access-services quotas require subtitling, signing and audio description on licensed channels, all of which must meet timed, formatted and culturally appropriate standards that a raw translation file cannot fulfil.
- ASA — local disclaimer and claim adaptation on marketing media under the UK advertising codes requires on-screen text and voiceover to be reworded, not merely translated, to comply with permitted claims in the UK market.
- BBFC — classification cards and content markers on UK-distributed film must appear in English and meet prescribed formatting, making graphic localisation mandatory.
- PEGI — age-rating labels on game media distributed across Europe require territory-specific on-screen elements that differ by country, triggering a localisation workflow for every additional market.
Each obligation forces on-screen text, subtitle timing or audio-description tracks to be produced natively for the target market. That production requirement converts the brief from translation into localisation before delivery — a structural reality of UK and European distribution, not a commercial upsell.
How do subtitle reading-speed limits make literal translation impossible?
Streaming and broadcast subtitle standards cap reading speed at 17–20 characters per second and limit each line to 42 characters — hard engineering constraints that are built into delivery validation tools and will cause automatic rejection of non-compliant files. A compact English sentence frequently expands by 20–40% when rendered in German, Polish or Arabic. The resulting text breaches the characters-per-second cap and wraps across more lines than the display allows. The linguist cannot simply translate; they must condense, restructure and culturally reframe the line so that it communicates the full meaning within the permitted reading window. That is a localisation act, governed by cultural and technical judgement, not a translation act governed by linguistic equivalence alone. The format enforces localisation whether or not the buyer has budgeted for it.
What are the 5 tiers of the media localization spectrum?
The media localisation spectrum has 5 tiers, from raw subtitle translation at 1.0× baseline to full transcreated dub at 2.2× the £30-per-page baseline. Each tier maps to a distribution channel and a defined deliverable stack.
| Tier | Intervention | Multiplier | Best-fit use |
|---|---|---|---|
| 1 | Raw subtitle translation | 1.0× | Internal, legal, archival |
| 2 | Timed captioning | 1.2× | Corporate, social, podcasts |
| 3 | Subtitle localisation + graphic adaptation | 1.4× | Marketing, e-learning |
| 4 | Voice-over localisation | 1.8× | Documentary, training, ads |
| 5 | Full transcreated dub + re-shot assets | 2.2× | Streaming originals, flagship games |
When is Tier 1 raw subtitle translation enough?
Tier 1 raw subtitle translation suits internal, legal or archival footage where audience fit is not the goal. A single linguist delivers time-coded SRT within 24 hours for content under 1,000 words. Cultural adaptation is out of scope at this tier.
When does a project need Tier 5 full transcreated dub?
Tier 5 full transcreated dub suits streaming originals, high-budget marketing films and flagship game titles where lip-sync, casting and cultural rewriting are required. Pricing sits at 2.2× the translation baseline over 10–15 working days per 10,000 words. Transcreation is the creative rewriting layer for taglines and hero lines, and applies equally to instructional-design outputs covered in E-Learning Content Translation.
How is a media localization project delivered under ISO 17100 in the UK?
A media localisation project runs under ISO 17100 as a 6-stage workflow: transcription, translation, editing, proofreading, in-country cultural review and technical QA. 3 different qualified linguists cover the linguistic layer and a fourth in-country reviewer covers the cultural layer. Same-day delivery is available for rush jobs placed from London before 11:00 GMT.
- Transcription of source audio to time-coded script.
- Translation of dialogue, narration and on-screen text.
- Editing by a second qualified linguist.
- Proofreading by a third qualified linguist.
- In-country cultural review of imagery, references and disclaimers.
- Technical QA on subtitle timing, reading speed and file conformance.
The same superset principle applies across regulated content — see Technical Translation Services London for the equivalent workflow in engineering and manufacturing media. Transcreation for marketing hero copy is covered separately in Marketing Translation Services London.
Which UK-specific deliverables do media localization projects produce?
UK media localisation projects produce 5 delivery masters:
- EBU-STL — broadcast subtitle master required by UK licensed channels.
- WebVTT — streaming subtitle format for SVOD and web delivery.
- SRT — general-purpose subtitle format for social, corporate and archival media.
- Dubbed audio stems for voice replacement in the mix.
- Adapted graphic packages for on-screen text and chyrons.
BSL considerations and audio description are scoped in on Ofcom-licensed deliverables to meet access-services quotas.
How are localization files handled technically in game and app pipelines?
Localisation files sit in dedicated /media/localization/ folders separated from core code, exchanged via XLIFF, and re-integrated through continuous localisation pipelines. Translated and culturally adapted strings ship alongside features without engineering rework. Translation memory alone cannot power a localised dub — voice casting, timing and asset re-shoots require a full production workflow beyond the TM layer.
Pricing
How much do media translation and media localization cost in the UK?
Media translation starts from £30 per certified page under an ISO 17100 TEP workflow, and media localisation runs at 1.4×–2.2× that baseline depending on the tier of service required. The cost multiplier reflects the additional production layers — cultural review, timing adaptation, graphic localisation and compliance checking — that each tier adds on top of the linguistic foundation. Same-day turnaround is available for content under 1,000 words placed before 11:00 GMT, and rush delivery on projects up to 10,000 words carries a 25–50% surcharge. London-based projects placed before that morning cut-off can receive same-day subtitle translation, making the service viable for breaking news, live-event recap content and urgent internal communications.
The four-tier pricing structure below reflects real workflow differences, not arbitrary price bands. Subtitle localisation requires reading-speed timing and line-length compliance; voice-over localisation adds script adaptation, studio coordination and audio engineering; a fully transcreated dub requires creative rewriting, casting, direction and post-production mixing. Each tier is a distinct production discipline with its own quality gates.
| Service | Starting price | Turnaround |
|---|---|---|
| Media translation (ISO 17100 TEP) | £30 per certified page | Same-day for under 1,000 words (before 11:00 GMT) |
| Tier 3 subtitle localisation | £42 per page (1.4× baseline) | 5–8 working days per 10,000 words |
| Tier 4 voice-over localisation | £54 per page (1.8× baseline) | 8–12 working days per 10,000 words |
| Tier 5 full transcreated dub | £66 per page (2.2× baseline) | 10–15 working days per 10,000 words |
| Rush surcharge (up to 10,000 words) | +25–50% on all tiers | Placed before 11:00 GMT |
Choosing the right tier at the scoping stage is the single most effective way to control cost. A project briefed as Tier 3 that requires lip-sync dubbing will need to be restarted at Tier 5, doubling timeline and budget. Our team provides a no-obligation scoping assessment that maps your distribution channel, regulatory environment and audience expectations to the correct tier before work begins.
Which media translation and localization services does the London agency deliver?
The London agency delivers six core media language services — subtitle translation, closed captioning, voice-over localisation, full dubbing, video localisation and game localisation — all operating under an ISO 17100 TEP workflow with three independent qualified linguists at every linguistic stage. Coverage extends across 200+ languages, making the service viable for simultaneous multi-territory releases without the coordination overhead of managing separate regional vendors.
Each service maps to a distinct production requirement:
- Subtitle translation — delivers SRT files for social, corporate and archival media; the general-purpose format for non-broadcast distribution.
- Closed captioning — produces timed caption files that meet access-services obligations, including reading-speed compliance at 17–20 characters per second and a maximum of 42 characters per line.
- Voice-over localisation — adapts scripts for natural-sounding delivery in the target language, coordinating studio recording and audio engineering.
- Full transcreated dubbing — rewrites dialogue for lip-sync accuracy, casts voice talent and delivers broadcast-ready mixed stems.
- Video localisation — covers the complete adaptation layer: language, cultural references, on-screen graphics, units, currency and regulatory compliance markers, with EBU-STL broadcast masters for UK licensed channels.
- Game localisation — handles UI strings, voiceover, age-rating label integration and territory-specific compliance across all major platforms.
Same-day turnaround is available for urgent subtitle translation files under 1,000 words placed before 11:00 GMT, with a 25–50% rush surcharge applicable to projects up to 10,000 words. For multi-channel campaigns that require both video and web adaptation, scoping guidance is available through our Website Translation Services: Multilingual, SEO-Ready Websites for UK Businesses.