The verdict in three sentences
A multilingual site is not a simple translation: it is a technical architecture (hreflang, dedicated URLs per language, segmented sitemap) that avoids duplicate content and ranks each version on its own market. In 2026, adding a second language costs 30 to 60 % of the base price depending on page count and SEO translation depth. Done right, a bilingual site often doubles international organic traffic in 6 to 12 months and opens the door to the diaspora and clients outside your core language zone.
What drives the markup
The markup depends less on the number of languages than on the volume of content to translate and the quality required. Machine translation with review is cheap but performs poorly in SEO; keyword-optimized human translation costs more but captures qualified traffic.
| Number of languages | Markup vs base site | Hreflang handling | Translation | Indicative price 2026 | International traffic gain |
|---|---|---|---|---|---|
| 1 (single language) | Reference | Not required | — | 0 FCFA | Base |
| 2, reviewed machine | +30 % | Automatic | Machine + review | 150,000 - 450,000 FCFA | +40 to +70 % |
| 2, human SEO | +50 % | Manual/plugin | Human + keywords | 400,000 - 900,000 FCFA | +90 to +180 % |
| 3 (with Arabic) RTL | +75 % | Manual + RTL | Specialized human | 900,000 - 1,800,000 FCFA | +120 to +220 % |
| Kenya site (EN + Swahili) | +25 to +40 % | Automatic | Local human | approx. 350,000 - 800,000 FCFA | +60 to +130 % |
In Kenya, an English/Swahili site adds 25 to 40 % to the quote: since English is already the business language, most of the effort goes to commercial Swahili and local targeting.
The essential technical items
A multilingual setup rushed on a free plugin ends up penalized by Google. Here is what must appear on the quote.
| Technical item | Role | Typical markup | Consequence if missing |
|---|---|---|---|
| Hreflang tags | Signal language/region to Google | 50,000 - 120,000 FCFA | Duplicate content, wrong country served |
| Dedicated URLs (/en /sw) | One indexable page per language | Included if well designed | Only one version indexed |
| Segmented sitemap | Clean per-language indexing | 30,000 - 80,000 FCFA | Second-language pages undiscovered |
| Language switcher | UX + preference cookie | 40,000 - 90,000 FCFA | Friction, bounce |
| SEO translation | Keywords per market | 3,000 - 8,000 FCFA/page | Almost no traffic in second language |
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Mini case study
Fatou, director of a consulting firm in Dakar, wants to reach diaspora clients and international NGOs. Her 12-page French site cost 600,000 FCFA. She adds English in human SEO translation: markup +50 %, or 300,000 FCFA. Six months later the English version generates 45 % of traffic and 3 international quote requests per month at an 800,000 FCFA average engagement. The 300,000 FCFA markup is repaid the moment the first assignment is signed.
FAQ
Do I really need a human translator or is AI enough? For display content (legal notices, secondary blog), reviewed AI translation is fine. For commercial and SEO pages, human translation captures 2 to 3 times more qualified traffic: the 3,000 to 8,000 FCFA per page pays off quickly.
Is hreflang really mandatory? Yes, as soon as you target several countries or languages. Without it, Google may serve the first-language version to a foreign speaker and penalize you for duplicate content, cutting traffic by 30 to 50 %.
How long before I see results in the second language? Expect 3 to 6 months for indexing and 6 to 12 months for meaningful traffic, provided you publish fresh content regularly, not just translate what exists.
Can I add a language later? Yes, but plan the multilingual architecture from day one: adding a language to a poorly designed site costs 40 to 80 % more than building it in at launch.
Let's talk about your project. We assess the exact multilingual markup for your site and the international traffic to target, free of charge. 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.
