Scaling e-commerce ads in Belgium: one country, two markets

Belgium looks like the easiest step for Dutch brands, and that is exactly where it goes wrong. Flanders and Wallonia are two markets with their own language, tone and sensitivities. Here is how to get it right.

You do not scale Belgium as one market, but as two. Flanders speaks Dutch, Wallonia speaks French, and each region has its own tone, sensitivities and buying behavior. Brands that aim one campaign at all of Belgium, with copy written for the Netherlands on top, pay for it in quiet underperformance: the ads run, but never truly land anywhere.

Why is Belgium two markets?

Because language is identity here. The language border does not just run across the map but through media, humor, politics and culture. A Fleming and a Walloon watch different shows, follow different creators and recognize different references. For an advertiser that means: what performs in Antwerp tells you nothing about Liège. Serve both regions the same material and you are unknowingly choosing half the country while irritating the other half.

In practical terms it also means two separate campaign sets. Language based targeting per region, dedicated creatives per language, and separate learnings per market. It feels like double work, but it is the only setup where your data teaches you anything: one mixed campaign averages two different realities into a number that describes neither. And Brussels? The capital is officially bilingual but predominantly French speaking in practice, with a large international community. Most brands serve Brussels from their French language campaigns, which works fine as a starting point. Just do not treat it as a separate third market: it is too small and too mixed for that.

Why does Netherlands Dutch copy underperform in Flanders?

This is the trap almost every Dutch brand walks into: Flemings understand us anyway, right? Understand, yes. Feel, no. Netherlands Dutch reads like a foreign accent in Flanders. Word choice gives you away instantly, and typical Dutch directness does not carry the same charm south of the border. A Flemish reader tastes the difference in tone within two sentences. The result is not confusion but distance: this brand is not from here.

Tone matters at least as much as vocabulary. Flemish communication is softer, more modest and more indirect than Dutch. The loud offer that works in the Netherlands comes across as pushy in Flanders. So work with Flemish copywriters or creators, or at minimum have your copy rewritten by a Fleming rather than just proofread. And the strongest route: Flemish creators in your UGC, because one recognizable voice does more than a hundred adjusted words. Small signals add up here: a .be domain, prices and shipping information that are correct for Belgium and reviews from Belgian customers together make the difference between a foreign brand and a brand that simply belongs.

In Flanders you do not lose because they cannot understand you, but because they can hear you are not from here.

How do you approach Wallonia?

Wallonia gets structurally skipped or rushed by Dutch and Flemish brands, and that is exactly the opportunity. The basics: French language creatives that feel native, not translated Flemish ads. Think French speaking Belgian creators, local references and a tone that can be warmer and more personal than up north. Note that Belgian French sounds slightly different from Parisian French; a Walloon reader notices, and a local creator solves that automatically.

Also remember that whatever brand awareness you built in Flanders is worth nothing there. Wallonia is a cold start: build social proof locally, start with your proven angles from other markets as hypotheses, and validate them again. What convinces a Flemish mother may leave a Walloon mother cold. So split your starting budget in proportion to the opportunity: for most product categories Flanders is the bigger market and justifies the larger share of your spend, but give Wallonia enough budget to genuinely learn. A symbolic leftover budget produces no data, only the illusion that you tried.

What else needs to change compared to the Netherlands?

• Payments: Bancontact is the standard in Belgium; a checkout without it costs you conversion.
• Trust: Belgian shoppers are a bit more cautious with unknown webshops; local reviews and clear delivery and returns information do heavy lifting.
• Delivery: state explicitly what shipping to Belgium costs and how long it takes; uncertainty there is a silent conversion killer.
• Structure: separate campaigns per language region, so budget, creatives and learnings stay clean per market.

Is Belgium the right first step abroad?

For Dutch brands, often yes, provided you treat it as real expansion. Logistics are simple, distance is small and part of the language is shared. But precisely because it feels so close, brands skip the localization they would absolutely do for Germany or France. Flip that around: use Belgium as your training ground for serious localization. The muscle you build here, two language versions, native creators, separate learnings per market, is exactly the muscle you need for every next European market.

Conclusion

Rewarding Belgium with real localization is the difference between a mediocre extra market and a strong second home market. Two language regions, two creative approaches, one brand. Building native creatives per market and scaling them profitably is the core of what we do: we run campaigns in 18 countries and produce creatives in up to 10 languages. Considering Belgium, or already live but not growing fast enough? Book a call and we will gladly take a look with you.