The verdict in three sentences
A multilingual B2B website for an exporter budgets between 12,000 and 30,000 EUR (approx. USD 13,000-33,000) for the base, then 2,000 to 3,500 EUR per additional language in 2026. The real cost difference is not translation but native i18n architecture (hreflang, localized URLs, international SEO) versus patched-together plugins. Plan +15% development for an RTL language like Arabic.
Native i18n versus translation plugin
The classic trap: assuming an automatic translation plugin is enough. It degrades SEO, breaks hreflang and prevents per-market commercial nuance. A native i18n architecture (like next-intl) costs more to set up but slashes maintenance costs and protects your export search rankings.
| Criterion | Native i18n | Translation plugin |
|---|---|---|
| Initial cost (5-language base) | 18,000 - 30,000 EUR | 8,000 - 14,000 EUR |
| Hreflang and localized URLs | Complete | Partial / unstable |
| International SEO | Optimal | Degraded |
| Per-market nuance | Yes | No |
| Annual maintenance | 1,500 - 3,000 EUR | 3,000 - 6,000 EUR |
| RTL (Arabic) | Supported | Often broken |
Costing language by language
Each market has a predictable marginal cost. Here is a 2026 order of magnitude for an exporter targeting 5 markets, with professional translation and local SEO adaptation.
| Language | Translation + local SEO (EUR) | Dev/integration (EUR) | Maintenance/year (EUR) |
|---|---|---|---|
| English | 2,500 | 1,000 | 600 |
| German | 3,000 | 1,000 | 700 |
| Spanish | 2,500 | 1,000 | 600 |
| Chinese (Mandarin) | 3,500 | 1,500 | 900 |
| Arabic (RTL) | 3,500 | 2,000 | 900 |
A 20,000 EUR base + these 5 languages (~24,500 EUR) puts the initial project around 44,500 EUR, with annual maintenance of about 3,700 EUR.
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Mini case study
Stephane, export director of an industrial components exporter (28M EUR revenue, 40% international) based in Singapore, wants to cover Germany, Spain, China and the Gulf. Native i18n base at 22,000 EUR, plus EN/DE/ES/ZH/AR for 24,500 EUR, i.e. 46,500 EUR. On the German market alone, a properly localized site (not machine-translated) helped him convert 3 extra qualified leads per month. At an 8,000 EUR average B2B deal and a 20% close rate, that is roughly 57,600 EUR of additional annual revenue — the site pays for itself in under a year.
FAQ
Can an automatic translation plugin do the job at launch? To test a market, yes, but it plateaus fast: degraded SEO, no commercial nuance, unstable hreflang. The extra maintenance cost (3,000-6,000 EUR/year) eventually exceeds the initial saving.
What does an extra language really cost? Between 2,000 and 3,500 EUR depending on the language, including professional translation, local SEO adaptation and integration. Mandarin and Arabic sit at the top of the range.
Why is Arabic more expensive? RTL (right-to-left) requires adapting the entire layout, components and CSS, roughly +15% development on the affected elements, plus dedicated QA.
Is hreflang really essential? Yes for international SEO: it tells Google which version to serve by language and country. Misconfigured, it tanks your visibility on target markets.
How do we reduce multilingual maintenance? By centralizing content in a CMS with translation keys and avoiding hardcoded text. A solid i18n base cuts annual maintenance to 1,500-3,000 EUR versus double with a plugin.
Let's scope your project. Tell us your target markets, languages and an indicative budget: we will cost the i18n base and the marginal per-language cost. 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.
