The verdict in three sentences
Making a B2B site multilingual in Amsterdam costs 30 to 50 % more than the monolingual version in 2026, or 1,500 to 4,000 EUR per added language. A native i18n integration (architecture planned from the start) costs more upfront but halves evolution costs versus an automatic translation plugin. For export SEO, hreflang and localized content are not optional: without them you waste your multilingual investment.
How much each added language costs
The cost per language depends on the method: professional human translation, technical integration and SEO adaptation. Here are the 2026 ranges for a 25-page B2B site.
| Line item per language | Method | 2026 cost |
|---|---|---|
| Professional B2B translation | Specialized translator | 1,200-2,500 EUR |
| Technical i18n integration | Dev | 600-1,200 EUR |
| SEO adaptation (hreflang, meta) | SEO | 400-900 EUR |
| Native proofreading & QA | Proofreader | 300-600 EUR |
| Indicative total per language | — | 1,500-4,000 EUR |
Native i18n or automatic translation plugin?
The technical choice structures all future costs. An automatic plugin (DeepL API wired into the CMS) is fast but produces content that is not SEO-optimized and hard to fix case by case.
| Criterion | Native i18n (next-intl) | Auto plugin (DeepL/Weglot) |
|---|---|---|
| Initial setup cost | 2,500-5,000 EUR | 800-1,500 EUR |
| Recurring cost | low | 500-2,400 EUR/yr (subscription) |
| SEO quality | excellent | average |
| Editorial control | full | limited |
| Native hreflang | yes | partial |
| Ideal for | strategic export | quick launch |
Mini case study
Thomas, export director of an industrial SME in Amsterdam, starts from a 14,000 EUR NL site and wants EN and DE to target Germany. He budgets 2 x 3,000 EUR = 6,000 EUR for integration, bringing the project to 20,000 EUR. The German market represents an estimated pipeline of 180,000 EUR in annual quotes; even with a cautious 4 % conversion rate, the site generates 7,200 EUR of margin in year one on that channel. The 6,000 EUR multilingual premium pays for itself in under 10 months, and choosing native i18n saves him an 1,800 EUR/yr plugin subscription.
FAQ
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How much does each additional language cost?
Between 1,500 and 4,000 EUR per language for a 25-page B2B site, translation, integration and SEO included. The cost per language drops if you add several at once.
Is hreflang essential?
Yes. Without hreflang tags, Google may serve the wrong language to your prospects and treat your pages as duplicate content, which hurts your international SEO.
Should I translate the whole site or just the essentials?
For export, translate at minimum your product pages, contact page and key landing pages. Translating 100 % of the blog can wait: focus the budget on commercial-intent pages.
Is an automatic translation plugin enough?
For a quick launch or a secondary market, yes. For a strategic market where SEO matters, native i18n with human translation converts noticeably better despite a higher upfront cost.
How much time does multilingual add?
Plan for +2 to 4 weeks on the schedule, mainly for professional translation and native proofreading. The technical integration itself rarely adds more than a week.
Let's scope your project. Tell us your target languages and priority export markets, and we will price the i18n integration and 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.
