The verdict in three sentences
A French or Dutch B2B buyer who finds a site only in one language leaves for your competitor: 72% of European decision makers prefer to buy in their own language. In 2026, a multilingual site represents a 20 to 35% surcharge over a monolingual one, with professional translation at EUR 0.10 to 0.18/word and a clean hreflang architecture across 3 to 5 languages. The return is measured in export leads: a properly localized site typically captures +30 to +60% more enquiries from the targeted markets.
What multilingual really costs
The surcharge is not just translation. Budget for architecture (hreflang, subfolders or subdomains), UX adaptation (German text runs +30% longer), local SEO per language and multiplied application maintenance.
| Item | Monolingual | Multilingual (4 languages) | Surcharge |
|---|---|---|---|
| Design + dev | EUR 12,000 | EUR 15,500 | +29% |
| Translation (25,000 words/language) | — | EUR 3,000-4,500/language | +EUR 12,000 |
| Hreflang architecture | Included | EUR 1,500-3,000 | Added |
| Local SEO per language | EUR 800 | EUR 800 x language | x3 |
| Annual maintenance | EUR 1,800 | EUR 2,340 | +30% |
| Delivery timeline | 6-8 weeks | +3 to +5 weeks | Extended |
Cost per language and expected return
Not all languages carry the same ROI. From Berlin, English is the export baseline, followed by French and Dutch for neighbouring markets.
| Language | Target market | Translation (25k words) | Export priority | Estimated lead gain |
|---|---|---|---|---|
| English | International | EUR 3,000-4,000 | Very high | +40 to +70% |
| French | FR, BE, CH | EUR 3,500-4,500 | High | +25 to +45% |
| Dutch | NL, BE | EUR 3,800-4,500 | Medium-high | +15 to +30% |
| Spanish | ES, LatAm | EUR 3,000-4,000 | Medium | +10 to +25% |
| Italian | IT | EUR 3,200-4,200 | Medium | +10 to +20% |
Mini case study
Sabine, export director at an industrial SME in Berlin (precision equipment), targets France and the Benelux. Trilingual DE/EN/FR site: budget EUR 21,800 versus EUR 15,000 monolingual, i.e. +45%. Export leads before: 8/month. Six months later: 19/month, of which 9 came directly from the localized pages. With an average B2B deal of EUR 14,000 and a 12% closing rate, the 11 extra leads represent roughly EUR 18,500 of additional monthly revenue: the EUR 6,800 surcharge is absorbed in under a month of pipeline.
FAQ
Need a professional website?
Kolonell builds websites that attract clients, optimized for the Sénégalese market. Free quote in 2 minutes.
How much does the budget rise for a multilingual site in 2026?
Budget a 20 to 35% surcharge on design/dev, plus EUR 3,000 to 4,500 of translation per language for around 25,000 words. A trilingual site typically costs 40 to 50% more than a monolingual one.
Should we use subdomains, subfolders or country domains?
Subfolders (/en/, /nl/) with hreflang are recommended in 2026: they concentrate SEO authority on a single domain and cost less to maintain than multiple ccTLDs.
Can we use machine translation?
For technical B2B, no: raw AI translation drives buyers away. Human post-editing at EUR 0.10-0.18/word is the credible minimum; fully automatic translation costs sales.
How long to deliver a multilingual site?
Budget the monolingual timeline (6-8 weeks) plus 3 to 5 weeks for translation, hreflang integration and per-language local SEO.
What does maintaining a 4-language site cost?
Multilingual maintenance rises about +30%: every content update must be propagated and re-translated. Budget this from the start to avoid languages falling behind.
Let's scope your project. Tell us your target markets and content volume and we will price the site, per-language translation and timeline. 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.
