The verdict in three sentences
In 2026, each extra language adds 40 to 60% to a website budget, across translation, integration, and governance. The real trade-off is no longer "should we translate" but "human translation, AI post-editing, or pure AI" depending on each page's commercial value. Technically, success rests on three pillars: correct hreflang, per-language sitemaps, and a clean i18n architecture (such as next-intl).
Cost per language and translation method
Cost depends on word count and method. Here are the 2026 ranges for an exporting SME's B2B/brochure site.
| Translation method | 2026 cost (EUR/word) | Quality | Recommended use |
|---|---|---|---|
| Professional human translation | 0.10 to 0.18 | Excellent | Sales pages, legal |
| AI post-editing (AI + pro review) | 0.04 to 0.08 | Very good | Blog, listings, high volume |
| Pure AI (no review) | 0.01 to 0.02 | Variable | Secondary content, drafts |
| Transcreation (adapted marketing) | 0.20 to 0.40 | Premium | Slogans, campaigns, hero |
For an 8,000-word site, human translation costs EUR 800 to 1,440 per language, AI post-editing EUR 320 to 640. Most SMEs choose a mix: human on conversion pages, AI post-editing on the blog.
The technical overhead of a multilingual site
Beyond translation, adding a language means recurring technical work. Here are the items to budget.
| Technical item | Cost per language (EUR) | Role |
|---|---|---|
| hreflang setup + sitemaps | 300 to 800 (one-off) | Avoid duplicate content, right country targeting |
| i18n architecture (/fr /en routing) | 500 to 1,500 (setup) | Reusable base for all languages |
| UI adaptation (lengths, possible RTL) | 200 to 700 | Buttons, menus, dates, currencies |
| Content governance | 150 to 400 /month | Keep updates in sync across languages |
| Extra project lead time | +2 to 4 weeks | Translation + integration + QA |
The i18n architecture is a one-time setup cost: once built with next-intl, adding a 3rd language (ES, AR) only costs translation and UI adaptation.
Mini case study
Marine runs an industrial SME that exports to Ireland and the Benelux. Her 7,500-word FR site must go FR/EN. She chooses: human translation on the 2,000 words of product and contact pages (EUR 280), AI post-editing on the 5,500 words of blog and news (EUR 330), plus EUR 600 of hreflang/i18n setup and EUR 400 of UI adaptation. Total: ~EUR 1,610 for the English version, or 55% of a brochure-site budget. Within 6 months the EN version generates 18% of quote requests, including two export contracts: the overhead is repaid on the first order.
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FAQ
Is AI translation good enough in 2026?
For secondary content or volume, post-edited AI is excellent and cuts cost by two or three times. For your sales pages, legal page, and slogans, human review remains essential: an error there costs customers.
What is hreflang and why is it critical?
It is the tag that tells Google which version to serve based on the visitor's language and country. Misconfigured, it creates duplicate content and surfaces the wrong version in results.
Do I need a domain per language (.fr, .co.uk)?
Not necessarily. Subdirectories (/fr, /en) on a single domain are simpler to manage and concentrate SEO authority. Separate domains are only justified for strong per-country strategies.
How much time does a language add to the project?
Expect 2 to 4 extra weeks: translation, CMS integration, then linguistic and technical QA (links, tags, rendering). This shrinks on later languages once the architecture is in place.
How do I manage updates over time?
Set up content governance: every FR change should trigger the EN update. A budget of EUR 150 to 400/month or a CMS workflow prevents drift between versions, a classic source of inconsistencies.
Let's scope your project. Give us your content volume and target languages and we'll price a multilingual site (typical 40-60% overhead per language) with a next-intl architecture and clean hreflang. Detailed quote within 48 h. WhatsApp +221 77 596 93 33.
Mohamed Bah
Fondateur, Kolonell
Passionate about digital and entrepreneurship in Africa, Mohamed has been helping Sénégalese businesses with their digital transformation since 2020. Founder of Kolonell, he believes every SME deserves a professional and accessible online présence.
