The verdict in three sentences
A multilingual B2B website in 2026 costs 20 to 35 % more than a monolingual site, most of it from translation and technical i18n. The real risk is not the price: it is a mis-implemented hreflang that surfaces the wrong language in Google. Each extra language adds content to maintain: two excellent languages beat five mediocre ones.
Cost per language and per page volume
The multilingual budget is calculated first per translated word, then on internationalization effort. Here are the 2026 orders of magnitude.
| Line item | 2026 range | Detail |
|---|---|---|
| Technical i18n (base) | 2,500-6,000 EUR | routing, hreflang, language switcher |
| Pro translation FR→EN | 0.12-0.20 EUR/word | B2B domain translator |
| AI post-editing + review | 0.05-0.09 EUR/word | high-volume option |
| Arabic (RTL) | +1,500 EUR | right-to-left layout |
| Additional lead time | +2-4 weeks | per language pair |
| Multilingual maintenance | +80-200 EUR/month | content synchronization |
For a 40-page site with ~600 words per page, expect 24,000 words to translate, i.e. 2,880 to 4,800 EUR of translation, plus i18n.
Two languages, five languages: the volume effect
Adding a language is not linear: the i18n base is paid once, but translation and maintenance grow with each language.
| Configuration | Premium vs monolingual | Indicative budget (40-page site) |
|---|---|---|
| FR only | baseline | 12,000-18,000 EUR |
| FR + EN | +20-25 % | 15,000-22,000 EUR |
| FR + EN + ES | +30-40 % | 18,000-26,000 EUR |
| FR + EN + AR (RTL) | +35-45 % | 20,000-28,000 EUR |
Decision rule: add a language only if it maps to a market where you have active sales muscle. A language with no editorial upkeep becomes an SEO liability.
Need a professional website?
Kolonell builds websites that attract clients, optimized for the Sénégalese market. Free quote in 2 minutes.
Mini case study
Sarah, export director of a 60-person industrial SME in Lyon, wants to take her 35-page site to FR + EN to target Germany and the Benelux. Volume: 21,000 words. Professional translation at 0.16 EUR/word = 3,360 EUR; technical i18n = 4,000 EUR; total premium = 7,360 EUR on a base budget of 16,000 EUR (i.e. +23 %). Target outcome: 15 % more inbound leads from English-speaking markets. With a B2B average deal of 18,000 EUR and 4 leads converted in year one, the return far exceeds the premium by the second quarter.
FAQ
Is hreflang really essential? Yes. Without correct hreflang tags, Google may serve the FR version to an English speaker, hurting bounce rate and ranking. It is the top cause of multilingual underperformance.
Human or AI translation? For technical B2B, AI translation post-edited by a domain reviewer (0.05-0.09 EUR/word) offers the best value. Fully human translation (0.12-0.20 EUR/word) remains preferable for strategic sales pages.
How much time does a language add? Expect 2 to 4 weeks per language pair for translation, integration and linguistic QA.
Sub-domain or sub-folder per language? The sub-folder (/en/) is easiest to maintain and concentrates SEO authority. Sub-domains are mainly justified for separate legal entities per country.
Does Arabic cost more? Yes, about +1,500 EUR: the right-to-left (RTL) layout requires adjustments to components, menus and icons.
Let's scope your project. Tell us your target languages, page count and priority market, and we will price the multilingual premium, typically +20 to 35 % of the base budget. 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.
