Multilingual website and SEO
We turn your website into a real multilingual site: Dutch and French pages that read like native copy, built on the keywords people actually use in each language, with hreflang that works. If your site runs on a translation plugin today, we clean up the machine translations before they cost you credibility.
Tanguy De Keyzer Founder & digital strategist Last updated: 6 October 2026
Trusted by growing brands
Sound familiar?
Our French pages read like machine translation, and Walloon customers notice.
We installed a translation plugin, but we see no French-speaking visitors from Google.
Google shows the Dutch page to French-speaking searchers, or the other way around.
We translated literally, but nobody searches for those words in French.
Translating every new page takes weeks and never gets finished.
How we help
We treat every language as a market of its own: first the search behaviour per language, then native copy on those keywords, then a technical foundation with separate URLs and hreflang. That way every language version gets found on its own instead of being a copy of the Dutch site.
Why Customer Impact
A French-speaking buyer searches with different words than a Flemish one. Per language and per market we measure which search term is the real question, and write for it. The URL follows the keyword in that language.
We work with native speakers and keep what works: your tone, your jargon, your proof. We only use machine translation as a rough start, never as the end product.
Separate URLs per language, hreflang in both directions, a language switcher without automatic redirects and a sitemap that lists every version. Exactly as Google recommends.
A translated page that links to Dutch pages leaves French-speaking visitors stranded. We translate links, cases and forms as well, so the whole journey stays in one language.
About Customer Impact
Customer Impact is a digital marketing agency founded by Tanguy De Keyzer. For more than 10 years we have been building the growth engine of startups, scale-ups and established companies.
Customer Impact works from Belgium for Belgian and European companies. Our own site exists in Dutch, French, English and German, with keywords measured per language. We put that approach to work for your website.
What we stand for:
What we do
Per language and per market, the search terms with real demand, so you translate what people search for.
Native speakers who guard your tone and jargon, including when cleaning up machine translations.
Separate URLs per language, hreflang in both directions and a language switcher that Google and visitors understand.
We check what a translation plugin publishes on your site and rewrite or exclude the weak pages.
Every translated page links to pages in the same language, with translated cases and forms.
Impressions, clicks and indexing per language, so you see which market grows and where it falls short.
Our process
We check your existing language versions, hreflang, URLs and the quality of any machine translations.
Per market we measure which search terms are really used and which pages cover the most demand.
Native speakers write or rewrite the pages on those keywords, in your tone.
Separate URLs, hreflang, language switcher, sitemap and metadata per language, tested before launch.
We track impressions and clicks per language version in Search Console and fill the gaps.
Always all-in
Belgium has two large language markets on one small territory. If you only communicate in Dutch, you leave Wallonia and much of Brussels on the table. If you leave the French version to a translation plugin, you often get pages that exist but do not get found, or that a French-speaking buyer immediately recognises as translated.
As a partner for multilingual websites and SEO we do more than translate. We measure per language which keywords are really used, have native copy written on those keywords and build the technical foundation so Google shows each language version to the right searcher. Want to understand first how translation, localisation and SEO fit together? Read our guide on website translation vs localization.
A translation plugin is fast, but not smart. It translates technical terms literally, picks words nobody searches for in Belgian French and publishes pages nobody checks. Google itself says that automatically generated content mainly meant to rank can fall under its spam policy on scaled content. We check what your plugin publishes, rewrite the pages that matter and keep the rest out of the index until it is good. What a plugin does well and badly, you can read in our review of Weglot and in AI translation for your website.
Google recommends giving every language version its own URL instead of switching language with cookies or settings, and not redirecting visitors automatically to another language. With hreflang you tell Google which version belongs to which language. We set that up, in both directions and with an x-default, and test it before launch. How hreflang works and which mistakes we see most, you can read in hreflang explained and fixing hreflang errors.
Curious where your site stands today? With our free hreflang checker, you see in a minute whether your language versions point to each other and whether a translation plugin is active.
For Belgian companies that want to win customers in both national languages, for webshops expanding to France, the Netherlands or Germany and for B2B companies with an English-speaking audience. A bilingual site calls for choices in structure and content; we list them in building a bilingual website and a multilingual website strategy. See how we approached it for YouPower and Hedgehog Company.
Multilingual work ties in with our SEO service, and for a new website with website development. Contact us and within 24 hours you hear how we would approach your multilingual site.
Most multilingual sites we see are translated, not localised. The French page uses words nobody in Wallonia types and links back to Dutch pages. Whoever treats every language as a market of its own often wins that market without much competition.
Tanguy De Keyzer Founder of Customer Impact and digital strategist No empty promises. This is what clients say about working with Customer Impact.
“I have been working with Customer Impact for a while now and it has been a breath of fresh air from the very start. The team complements itself perfectly, so you always have someone with very extensive knowledge of specific aspects of marketing, ranging from ads to web design and strategy. The hands-on approach means you can always get started right away, and the feedback is always clear and honest. No nonsense, just facts.”
Axel D.S.
Verified review via Google
“Customer Impact built a strong new website for us and set up a lead generation approach that truly delivers results.”
Janitor Waterschoot
Verified review via Google
“They do not just execute, they also think along strategically. Real B2B specialists. Recommended!”
Jack Daly
Verified review via Google
“Sharp and fast analysis of the problem, processes and possibilities. No complicated sales talk, fast, and a first setup that works well. A bit more attention to the fine tuning. Pleasant collaboration.”
Tandarts.nl
Verified review via Google
“Smooth communication, proactive thinking and everything neatly followed up.”
Claire Farrell
Verified review via Google
“Super professional and extremely creative! They managed to adjust and respond to all of our needs numerous times. Highly recommend ❤️”
Jovana Vakic
Verified review via Google
Compare your options
| Customer Impact | Translation plugin | Translation agency | In-house | |
|---|---|---|---|---|
| Starting point | Search behaviour per language and market | The existing text | The existing text | Depends on your team |
| Language quality | Native, with checks on tone and jargon | Automatic, variable | Good, but without keywords | Depends on native speakers |
| Keywords per language | Measured per market | No | Rarely | Sometimes |
| Hreflang and technical setup | Set up and tested | Partly automatic | Not included | Depends on your web developer |
| Follow-up | Visibility per language in Search Console | None | None | Variable |
These are typical traits per type of partner, not statements about specific agencies or tools.
What to expect
Week 1
We map your language versions and their technical setup and measure demand per language.
Week 2 to 4
We start with the pages with the most demand: homepage, services and your key landing pages.
Week 4 to 6
Hreflang, URLs, language switcher and sitemap, tested before the new language version goes live.
Month 2 to 3
Google discovers and indexes the new language versions; we track impressions and clicks per language.
After that
We add knowledge articles and pages where demand in that language is largest.
Case studies
At YouPower, French-speaking Belgium got translated Dutch pages, without its own rules or local projects. We built a knowledge base in which every topic exists in Dutch, French and English, with its own story per language and every reference page in the visitor's language.
Read the caseBuyers search in their own language. That is why every article in the Hedgehog Company knowledge base exists in Dutch and in English, so both groups find the same correct answer on the rules that apply to them.
Read the caseIn all honesty
Contact us
Briefly tell us what it is about. You get a personal reply from Tanguy or someone from the team, not a call centre.
We work on request, because the effort varies a lot. What drives the effort: the number of pages and languages, whether machine translations are already live and need rewriting, how much jargon your sector uses, the CMS your site runs on and whether we also do the technical setup with hreflang. After a short language audit you get a proposal with a clear scope.
For a first version or a small site a plugin can do the job, especially if you check the key pages yourself. The risk is in pages nobody checks: wrong technical terms, literal translations and keywords that nobody uses in that language. We check what the plugin publishes and rewrite the pages that matter.
Google judges the quality and usefulness of a page, not how it was made. Machine-translated pages mainly meant to rank without adding value can fall under the spam policies, though. A translation that a person has checked and improved is the safe route.
If the same page exists in several languages, yes. Hreflang tells Google which version belongs to which language or region, so a French-speaking searcher sees the French page. Every version must point to the others, otherwise Google ignores the annotation.
For most Belgian companies a subfolder per language (for example /fr/) is the simplest and strongest choice: all authority stays on one domain. A separate domain per country can make sense if you really run different activities per country.
Dutch and French are our core, for the Belgian market. We also work in English and German, always with keywords measured per language.
Start with a language audit, or test your hreflang and language versions yourself with our free multilingual check. You immediately see whether the versions point to each other and whether a translation plugin is active.
A knowledge base in three languages that answers Google and AI assistants.
A new knowledge base of 18 articles in English and Dutch.
A complete rebrand and a fast mobile-first website, in 4 markets.
