The verdict in three sentences
A trilingual corporate website (EN/FR/DE) is scoped in 2026 from a base of 22,000 to 42,000 EUR, each additional language adding roughly +25% to the content and integration budget. Professional translation (0.12-0.20 EUR/word) and hreflang management are the two line items that make or break international SEO. Plan for 12 to 16 weeks for a regional headquarters with a multilingual approval workflow.
The cost language by language
A multilingual site is not a duplicated site: it is a multi-locale CMS base plus a marginal cost per language (content, translation, linguistic QA). Here are 2026 orders of magnitude for a regional headquarters.
| Line item | 2026 range (EUR) | Detail |
|---|---|---|
| Corporate base (1st language) | 22,000 - 42,000 | Design, CMS, templates |
| Multi-locale CMS | 5,000 - 10,000 | Hreflang structure, multi-language editor |
| Additional language (x2) | +25% / language | Integration + QA |
| Professional translation | 0.12 - 0.20 EUR/word | By technical level |
| Linguistic QA | 1,500 - 3,500 / language | Native review |
| Hreflang & int'l SEO | 2,000 - 5,000 | Tags, per-language sitemaps |
For a 30-page site, expect roughly 15,000 to 25,000 words to translate. Across three languages, that is a translation line of 3,600 to 10,000 EUR on its own: a structural budget never to be deferred to the end of the project.
Translation: the real cost by volume
Content volume directly drives the budget. Here are 2026 orders of magnitude by site size and number of languages.
| Site size | Words (approx.) | 2 languages (EUR) | 3 languages (EUR) |
|---|---|---|---|
| 10 pages | 6,000 | 720 - 1,200 | 1,440 - 2,400 |
| 20 pages | 12,000 | 1,440 - 2,400 | 2,880 - 4,800 |
| 30 pages | 18,000 | 2,160 - 3,600 | 4,320 - 7,200 |
| 50 pages | 30,000 | 3,600 - 6,000 | 7,200 - 12,000 |
Machine translation post-editing (MTPE) can cut this line by 30 to 50%, but is not advised for high-stakes brand pages (home, about, offers).
Hreflang and international SEO
Poor hreflang implementation is the costliest mistake: Google serves the wrong language, bounce rate climbs, and international organic traffic stalls. Clean management (reciprocal tags, per-locale sitemaps, consistent URLs) generally generates +15 to +30% international organic traffic over 12 months, an order of magnitude observed on multilingual corporate rebuilds.
Mini case study
Nadia, communications director at a regional headquarters in Geneva, is leading the trilingual EN/FR/DE rebuild of a 30-page site. Chosen base: 33,000 EUR + multi-locale CMS 8,500 EUR. Two additional languages at +25%: +16,500 EUR. Translation 18,000 words x 3 languages at 0.16 EUR = ~5,800 EUR. Linguistic QA 3 languages: 7,500 EUR.
Need a professional website?
Kolonell builds websites that attract clients, optimized for the Sénégalese market. Free quote in 2 minutes.
Total budget: ~71,300 EUR. Business goal: capture the German-speaking (DACH) market. With an estimated +22% DE organic traffic and a 3% appointment conversion rate, the HQ projects 40 additional qualified leads per year, more than enough to amortize the multilingual premium in under 18 months.
FAQ
How much does an extra language really cost?
Roughly +25% of the content and integration budget per language, plus translation (0.12-0.20 EUR/word). For a 30-page site, one more language often comes to 8,000-12,000 EUR.
Is machine translation enough?
Not for brand pages. Post-editing (MTPE) cuts cost by 30 to 50% but native review (1,500-3,500 EUR/language) remains essential on strategic pages.
What is hreflang and why is it critical?
These are the tags that tell Google which language to serve to which user. Misconfigured, they can crash international traffic; done right, they add +15 to +30% traffic over 12 months.
What timeline for a trilingual site?
Expect 12 to 16 weeks for a regional headquarters, depending on content volume and native reviewer availability.
Does a standard CMS handle multilingual content?
Yes, but a well-designed multi-locale structure (5,000-10,000 EUR) avoids duplicates and hreflang errors that cost dearly in SEO.
Let's scope your project. Tell us the number of languages, page volume and target market. 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.
