150+ LANGUAGES · ISO 17100 CERTIFIED · SAME-DAY TURNAROUND
What Is Media Localization and How Does It Work?
Media localization adapts video, audio and interactive media for a new locale by translating dialogue, dubbing, subtitling, rebuilding on-screen text and localising cultural references.
- 150+ Languages
- ISO 17100 Certified
- Same-day Turnaround
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What we do
What is media localization?
Media localization is the end-to-end adaptation of video, audio and interactive media for a target locale, combining script translation, dubbing or voice-over, subtitling, on-screen-text rebuilding, cultural adaptation and technical engineering so meaning, timing and references land natively.
How it works
How does media localization work step by step?
Media localization works in eight sequential steps: source-asset audit, transcription, script translation, cultural adaptation, voice-over or dubbing recording, subtitle authoring, on-screen-text and graphics rebuild, and technical QA before broadcast-ready delivery.
What’s included
How much does media localization cost in the UK?
UK media localization costs from £7–£12 per minute for subtitles, £18–£35 per minute for voice-over and £45–£90 per minute for full lip-sync dubbing, per target language, with script translation billed separately from £0.10 per source word under ISO 17100.
Complete guide
Everything you need to know
UK brands globalising video, audio and interactive assets face a workflow far broader than translation alone. A London-based ISO 17100 translation agency handles that adaptation across five layers — linguistic, audio, visual, cultural and technical engineering — for markets across the EU, LatAm, APAC and beyond.
What we offer
What are the five layers of a media localization project?
A media localization project has five layers: linguistic (translation), audio (dubbing, voice-over, ADR), visual (on-screen text, graphics, imagery), cultural (idioms, humour, units, currency, dates) and technical engineering (mixing, subtitle authoring, format export), each with its own owner and QA gate.
| Layer | Owner | Deliverable | QA gate |
|---|---|---|---|
| Linguistic | ISO 17100 linguist + editor | Timecoded translated script | TEP four-eyes review |
| Audio | Dubbing director + sound engineer | Dub or VO track mixed to M&E stem | Lip-sync + EBU R128 loudness |
| Visual | Motion designer | Rebuilt on-screen text and graphics | Frame-accurate composite check |
| Cultural | In-market senior linguist | Adapted idioms, units, GBP → target currency | In-country native review |
| Technical engineering | Post-production engineer | MP4, MOV, ProRes master + SRT/VTT/TTML | Platform-spec conformance test |
Which layer owns cultural adaptation?
Cultural adaptation sits at the linguistic-plus-cultural intersection. It is owned by an in-market senior linguist who reworks idioms, humour, units, currency (GBP → target-market currency), dates, imagery and pop-culture callbacks so the localised media reads natively. Deeper cultural rework of video assets is covered on our Video Localization Services page.
How do the five layers map to deliverables and pricing?
Each layer maps to a deliverable and a UK price band:
- Linguistic: translated script from £0.10 per source word
- Audio (VO): £18–£35 per minute per language
- Audio (full lip-sync dubbing): £45–£90 per minute per language
- Visual: on-screen text rebuild quoted per graphic
- Subtitles: £7–£12 per minute per language
- Technical engineering: bundled into the audio or video line
Pricing
How long does media localization take?
A one-minute corporate video localises in 2–3 working days for subtitles, 4–5 days for voice-over and 7–10 days for full lip-sync dubbing. Timelines are governed by the ISO 17100 throughput benchmark of 1,500–2,000 script words per linguist per day, with additional time reserved for booth recording, audio mixing and technical engineering. Larger projects — a 30-minute e-learning module, for example — scale linearly from that baseline, so a 6,000-word script is a realistic four-day translation task before audio production even begins. Rush delivery is available for same-day needs up to 10,000 words, though a 25–50% surcharge applies to reflect the additional project management and out-of-hours booth costs involved.
Which steps can run in parallel to compress the timeline?
Transcription, glossary build and voice-casting all run in parallel with script translation, meaning the project does not sit idle while the linguist works. Subtitle authoring starts against the approved translation while dub recording continues in the booth. That deliberate parallelisation cuts a typical 10-day dubbing cycle to approximately 6 working days without breaching any ISO 17100 QA gate. The five workflow layers — linguistic, audio, visual, cultural and technical engineering — each carry their own QA checkpoint, so compression is achieved by overlapping layers rather than skipping reviews.
What are the main types of media localization?
The main types are video localization, audio and podcast localization, video-game localization, e-learning localization, social-media localization, mobile-app store-listing localization and interactive-advertising localization — each with distinct file formats, QA rules and cultural risks. Web and CMS-driven multimedia assets are handled through our Website and Multimedia Translation Services.
How is video localization different from broader media localization?
Video localization is one deliverable inside media localization, focused specifically on moving-image assets through subtitles, dubbing, on-screen text and graphics. Media localization is the umbrella term also covering audio-only, gaming and interactive assets.
Why is game localization uniquely complex?
Game localization is uniquely complex because it combines UI strings, branching dialogue, in-engine cinematics, culturally sensitive lore, ratings compliance (PEGI, ESRB) and constantly patched builds. Localisers make judgment calls on tone, intent and cultural fit that direct translation cannot resolve.
How is Latin American Spanish handled in media localization?
Latin American Spanish is usually localised once as a ‘neutral’ LatAm variant recorded in Mexico or Colombia and standardised across all Hispanic markets. Country-specific Mexican, Argentinian or Chilean cuts are commissioned only when a brand needs regional idiom, slang or humour to land — for example, an Argentinian football sponsorship spot that must use Rioplatense voseo, or a Mexican FMCG launch built on Chilango slang.
How does social-media localization differ from film or broadcast?
Social-media localization runs on shorter cycles of 24–72 hours, captions-first delivery, platform-native aspect ratios (9:16, 1:1, 16:9) and locale-specific trend piggybacking. Film and broadcast localization operate on multi-week timelines with certified linguist review and broadcast-standard audio deliverables. Hashtags are localised per platform, and a caption that works on LinkedIn rarely works on TikTok.
Can AI do media localization?
AI handles first-pass transcription, machine translation and synthetic voice-over acceptably for e-learning, internal comms and non-regulated marketing. It produces serviceable output quickly and at low cost, but it is not a wholesale replacement for human expertise. Every AI-assisted project still passes through an ISO 17100 human TEP (translate-edit-proofread) review cycle, because machine output introduces errors in register, idiom and technical terminology that an unreviewed file would carry directly to the audience. The linguistic, audio, visual, cultural and technical engineering layers of a full localization workflow each require human judgement that AI cannot yet replicate end-to-end.
Where does AI dubbing clear the quality bar?
AI dubbing clears the quality bar for single-narrator e-learning, product tutorials, internal training and long-tail back-catalogue content where budget prohibits human dubbing and the audience tolerates a synthetic voice. Voice cloning has reduced per-minute production costs substantially on suitable content, making it feasible to localize into 150+ languages at scale where a fully human workflow would be cost-prohibitive. The key condition is that the content must be emotionally neutral, factually stable and free of regulatory constraints — all of which allow synthetic performance to pass without undermining the audience’s trust.
Where does AI localization still fail?
AI localization still fails consistently in several well-defined categories, and selecting it for the wrong content type is a costly mistake:
- Emotional performance — drama, advertising and children’s content demand nuanced vocal delivery that synthetic voices flatten
- Regulated content — medical device narration and legal disclaimers governed by UK MHRA or FCA rules require a certified human reviewer in the chain
- Culturally coded language — humour, sarcasm and idiom require cultural adaptation that goes beyond word-for-word machine translation
- Brand voice-over — content built around a known signature actor or distinctive vocal identity cannot be replicated by a generic synthetic voice
In each of these cases, an ISO 17100 TEP workflow with in-market human linguists is not optional — it is the minimum quality standard the content demands.
Why is media localization important for UK businesses going global?
Media localization is important because 76% of global consumers prefer buying in their own language, dubbed and subtitled content drives up to 2.5× the completion rate of source-language video, and UK exporters selling into the EU, LatAm or APAC without localisation lose share to local-language competitors.
How does media localization support UK regulatory and accessibility duties?
Media localization supports UK compliance with the Equality Act 2010 (captions for accessibility), Ofcom subtitling quotas for licensed broadcasters, and the EU Accessibility Act 2025 for UK brands selling into the EU. Closed-caption and audio-description tracks are a legal deliverable, not an optional extra. Captions and subtitles are distinct: captions carry speaker identification and non-speech sound cues in the source language, whereas translated subtitles are the cross-language deliverable.
What are the biggest challenges in media localization?
The biggest challenges in media localization are cultural concepts with no target-language equivalent, lip-sync constraints that shorten translated lines, licensed music that cannot legally be redubbed, on-screen text baked into the video layer, and pricing pressure that erodes linguist quality across the industry. Each challenge is distinct in origin — linguistic, legal, technical or commercial — and each requires a different mitigation strategy rather than a single catch-all solution. Understanding where the risk sits helps brands make better decisions about which deliverable type to commission and at what budget.
How do localisers handle concepts that don’t exist in the target language?
Localisers handle missing concepts through transcreation — rewriting the line to preserve intent, emotional tone and comedic timing rather than the literal words. A culturally specific reference is sometimes replaced entirely with a target-culture equivalent that audiences recognise without a footnote. This approach is standard practice across the linguistic layer of the workflow and is one reason why media localization is more complex than documentary translation: the line must land in the mouth of a voice actor within a fixed time code, not simply appear on a page.
Why do audiences sometimes resist localised media?
Audiences resist localised media when they conflate poor execution with the practice of localization itself. Weak casting, awkward scripted lines or heavy-handed censorship all leave an impression that colours the audience’s view of localised content in general. The discipline is technically sound and well-established; the variation in audience reception tracks almost entirely to the quality of the vendor and the depth of cultural review, not to any inherent flaw in localizing media. An ISO 17100 certified workflow with named in-market linguists closes most of that gap.
What is the true cost of the MLV race to the bottom?
The multilingual-vendor race to the bottom erodes quality by squeezing linguist day-rates below the level sustainable for 1,500–2,000 words per day of careful, specialist work. When throughput is prioritised over cultural review, in-house QA teams are dissolved and the four-eyes TEP process is collapsed into a single-reviewer pass. UK brands increasingly re-shore critical media localization to accredited, named-linguist agencies that can demonstrate an unbroken ISO 17100 chain of custody from source script to broadcast-ready master. The short-term saving from a cheaper vendor is frequently offset by rework costs, brand damage or compliance exposure.
What we offer
How do you choose a media localization studio or agency?
Choose a studio by verifying ISO 17100 certification, insisting on named linguists with in-market residency, requesting an M&E-stem workflow, confirming TEP four-eyes QA, checking subtitle-format coverage (SRT, VTT, TTML), reviewing a same-language reel and clarifying whether AI is used behind the scenes.
- No ISO 17100 certification
- No named linguist assigned
- No request for the M&E stem
- No glossary or style-guide onboarding
- Per-word rates below £0.06
- No QA report deliverable
- An all-AI pipeline sold as human localisation
How does our London agency deliver media localization?
Our London agency delivers ISO 17100 certified media localization into 150+ languages from £7 per minute for subtitles, with same-day rush available for projects up to 10,000 script words. Every project is handled under a named in-market linguist model with TEP four-eyes QA, and every final deliverable is engineered to broadcast-ready specification — MP4, MOV or ProRes masters for video, WAV or MP3 for audio. Pricing scales transparently: subtitles run at £7–£12 per minute per target language, voice-over at £18–£35 per minute, and full lip-sync dubbing at £45–£90 per minute, all inclusive of the ISO 17100 workflow. A 25–50% rush surcharge applies to same-day requests reflecting out-of-hours resourcing.
Which languages, formats and platforms do we support?
We support the full range of languages and technical formats required for modern media distribution:
- Languages: 150+ target languages, covering all major broadcast, streaming and e-learning markets
- Subtitle formats: SRT, VTT and TTML — compatible with YouTube, Vimeo, self-hosted players and broadcast playout systems
- Video masters: MP4, MOV and ProRes broadcast-ready files
- Audio: WAV and MP3, mixed and normalised to platform loudness specs
- Platforms: YouTube, Vimeo, LinkedIn, Meta, self-hosted players and broadcast channels
The five workflow layers — linguistic, audio, visual, cultural and technical engineering — each carry a dedicated QA gate, ensuring that format compliance is verified independently of translation quality before any file leaves the project.
How do I request a media localization quote?
Request a quote by sending the source video runtime, target languages, deliverable type (subtitles, voice-over or dubbing) and platform specification. A fully scoped quote and ISO 17100 project plan is returned within one working day. Where source material is not yet final, a provisional quote based on estimated runtime and word count can be issued immediately so budgets are not held up by production timelines.
Common questions about media localization cover the translation-vs-localization distinction, whether dubbing and subbing count as localization, how regional language variants are handled, whether AI can replace human linguists and how brands vet vendors. The answers below address each question with the level of technical detail that a commissioning decision requires.
Frequently asked questions
What is media localization?
Media localization is the process of adapting audio-visual and written content — such as films, TV shows, video games, websites, and streaming platforms — so it feels natural and culturally appropriate for a specific target audience. It goes well beyond word-for-word translation and includes dubbing, subtitling, on-screen text adaptation, cultural references, humour, and even visual elements. A UK broadcaster, for example, may need its content localized into Arabic, Mandarin, or Polish to reach diaspora communities or international markets effectively.
Can you give me an example of localization?
A classic example of localization is Netflix adapting a US series for a UK, Spanish, or Japanese audience — changing date formats, currency symbols, culturally specific jokes, and dubbing or subtitling dialogue in the target language. Another example is a UK e-commerce website translating its product descriptions into French while also adjusting measurements, payment methods, and legal disclaimers to suit French consumers. In both cases, the goal is seamless user experience, not just linguistic accuracy.
What are the key steps in the localization process?
The localization process typically follows five core steps: content analysis, translation, cultural adaptation, technical integration, and quality assurance (QA). First, a project manager assesses the source material for complexity and cultural sensitivity. Translators then render the text, after which specialist editors adapt idioms, references, and tone for the target market. The adapted content is then integrated into the original format — be it a subtitle file, a website CMS, or a game engine — before a final QA review checks linguistic accuracy, formatting, and functionality.
What’s the difference between translation and localization?
Translation converts text from one language to another, while localization adapts the entire content experience for a specific culture, region, or market. Translation is a component of localization, but localization also covers date and number formats, currency, images, colour symbolism, legal compliance, and tone of voice. For instance, a UK company translating a brochure into German needs translation; launching its full website and marketing campaign for the German market requires localization. Professional translation agencies in London typically offer both services.
What does localization services mean?
Localization services refer to the full suite of professional work required to adapt content for a new language and cultural market. This includes translation, desktop publishing (DTP), subtitle and dubbing services, software and app localization, website localization, and cultural consulting. A professional translation agency offering localization services manages the entire workflow — from source file ingestion through to final delivery in the target format — ensuring the content meets the linguistic, cultural, and technical expectations of the target audience.
Why isn’t localization as simple as translating exactly what’s written?
Localization is more complex than direct translation because languages carry cultural, social, and contextual layers that don’t map one-to-one. A phrase that is humorous in English may be offensive or meaningless in Japanese. Idioms, measurements, legal terms, and even colour associations differ significantly between markets. For media content specifically, translators must also respect lip-sync constraints in dubbing, character limits in subtitles, and on-screen text readability — all while preserving the original tone and intent of the source material.
How do localization teams handle cultural concepts that don’t exist in the target language?
Localization specialists use several established strategies when a concept has no direct equivalent: domestication (replacing it with a culturally familiar equivalent), foreignisation (keeping the original term with a brief explanation), or creating a neologism that captures the meaning. For example, the English concept of ‘fair play’ may be retained in French as a borrowed term, while a Japanese food untranslatable into English might be described with a short gloss. Experienced linguists with in-country knowledge make these judgement calls to ensure the content feels natural rather than foreign.
Is dubbing or subbing handled the same way as localization?
Dubbing and subtitling are specialist disciplines within media localization, but each has its own technical requirements. Subtitling requires condensing dialogue to fit reading-speed limits (typically 17 characters per second) and strict line-length rules, while dubbing demands lip-sync accuracy and natural-sounding speech rhythm in the target language. Both require translation as a foundation, but the adaptation work differs considerably. Professional agencies offering media localization manage these separately, often using dedicated subtitle editors and voice casting directors alongside the core translation team.
Does Latin American Spanish get its own localization or is it standardized across countries?
For professional-quality media localization, Latin American Spanish is typically localized into regional variants rather than a single standardized ‘neutral’ Spanish. While a pan-regional ‘neutral Latin American Spanish’ is sometimes used for cost efficiency in subtitling, dubbing projects for major markets — such as Mexico, Argentina, or Colombia — generally require country-specific scripts and voice talent to avoid sounding artificial. Vocabulary, slang, and even grammar differ enough between countries that a single version can alienate audiences in specific regions.
Can AI do localization?
AI can assist with localization but cannot reliably replace human expertise, particularly for media content. Machine translation tools like DeepL or GPT-based systems can produce a workable first draft quickly, reducing time and cost, but they consistently struggle with cultural nuance, idiomatic language, humour, lip-sync constraints, and context-dependent terminology. Professional translation agencies in the UK typically use a hybrid approach — AI-assisted translation followed by post-editing by qualified human linguists — to maintain accuracy and quality while keeping turnaround times competitive.
How much do translation services cost in the UK?
Professional translation services in the UK are typically priced per word, with rates ranging from around £0.08 to £0.25 per word depending on the language pair, subject matter, and turnaround time. Certified or sworn translations for legal and official documents often carry a fixed fee per page or document, commonly between £25 and £80 per page. Specialist technical, medical, or legal translation commands premium rates, as does any project requiring urgent delivery. Media localization projects — including subtitling and dubbing — are usually quoted per minute of content.
What skills are needed for localization?
Effective localization professionals combine linguistic fluency with cultural expertise, subject-matter knowledge, and technical proficiency. Core skills include native-level command of the target language, strong writing and editing ability, familiarity with translation memory tools (such as SDL Trados, memoQ, or Phrase), and an understanding of file formats like XLIFF, SRT, or XML. For media localization specifically, knowledge of subtitle authoring software and timing is valuable. Many professionals also hold formal qualifications — such as a degree in translation or membership of the Chartered Institute of Linguists (CIOL) in the UK.