The verdict in three sentences
Making a company website multilingual costs +20 to +35 % of the initial build in 2026, plus professional translation at 0.12-0.20 EUR/word. The premium is not only translation: hreflang, per-market international SEO and per-language editorial management weigh just as much. Done well, a trilingual site can generate +40 % international organic traffic in 12 months thanks to local SEO per market.
The multilingual premium line by line
A multilingual site is not a translated single-language site: it is a site designed for several markets. Here are the 2026 line items for a mid-cap targeting two new markets.
| Line item | 2026 surcharge | Basis |
|---|---|---|
| Multilingual architecture | +20-35 % of build | i18n, hreflang, routing |
| Professional translation | 0.12-0.20 EUR/word | per language, no machine |
| International SEO | 2,000-5,000 EUR | keywords per market |
| CMS with language workflow | 3,000-6,000 EUR | per-language approval |
| Native proofreading | 0.04-0.06 EUR/word | linguistic QA |
| Editorial maintenance | +30-50 % of mono fee | multilingual publishing |
For a 20,000-word site in three languages, translation alone represents 7,200 to 12,000 EUR (two target languages at 0.18 EUR/word). Do not cut native proofreading: a poor translation destroys B2B credibility on an export market.
Two languages or three? The trade-off
Adding a language only makes sense if the market is a commercial target. Here are the 2026 benchmarks to decide by number of languages.
| Configuration | Premium vs mono | Expected international traffic (12 mo) |
|---|---|---|
| Single language | reference | reference |
| Base + EN | +20-25 % | +15-25 % |
| Base + 1 target market | +22-28 % | +20-30 % |
| Base + EN + target | +30-40 % | +35-45 % |
| 4 languages and up | +45-60 % | depends on active markets |
The traffic gain only materialises if each version has its own local SEO: market keywords, adapted content, local link-building. A plain translation without per-market SEO returns little. Target the languages where you have a sales force.
Mini case study
Claire runs a 140-person industrial mid-cap near Toronto, with 30 % of revenue exported to French- and Spanish-speaking markets. She budgets a trilingual EN/FR/ES site of 22,000 words.
Maths: base build 18,000 EUR, +30 % multilingual = 5,400 EUR, translation 22,000 words x 2 languages x 0.18 EUR = 7,920 EUR, international SEO 4,000 EUR. Total 35,320 EUR. Her organic traffic in the target markets rises from near zero to +38 % international sessions in 12 months, generating 22 extra export leads. At a 45 % close rate and a 12,000 EUR export order, that is about 118,000 EUR of added revenue. The multilingual premium pays back in under 6 months.
Need a professional website?
Kolonell builds websites that attract clients, optimized for the Sénégalese market. Free quote in 2 minutes.
FAQ
How much does multilingual really add?
Budget +20 to +35 % of the build for architecture, plus 0.12-0.20 EUR/word of professional translation per language. For a 20,000-word trilingual site, the total premium often sits between 12,000 and 18,000 EUR.
Is machine translation enough for a B2B site?
No for strategic pages. Unreviewed machine translation destroys credibility on an export market. Use professional, native-proofread translation at least on commercial and product pages.
What is hreflang and why is it critical?
Hreflang tells search engines which version to serve by language and country. Without it, Google may show the wrong version or penalise duplicate content. It is a technical prerequisite of international SEO.
Do three languages guarantee more traffic?
Only with per-market local SEO: keywords, content and link-building specific to each country. Done well, a trilingual site can gain +40 % international organic traffic in 12 months. A plain translation without SEO returns little.
Do I need a specific CMS for multilingual?
A CMS with a per-language workflow eases editorial approval and prevents out-of-sync versions. Budget 3,000-6,000 EUR for this workflow, quickly recouped if you publish regularly in several languages.
Let's scope your project. Tell us your target languages, content volume and export markets, and we will price a multilingual site optimised for international SEO. 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.
