Luxembourg teens built a free, four-language quiz game, and it just won the country’s top student business prize

Six high school students in Luxembourg just pulled off a startup-style win with a product most adults would be proud to ship: a free online quiz game packed with more than 400 questions about their tiny, multilingual country.

The project, calledLetz Guess, took the top honor for “best mini-company” at Luxembourg’s 2024 student entrepreneurship finals, then kept collecting trophies, adding awards for social entrepreneurship and marketing strategy. The message from judges was blunt: this wasn’t a cute class assignment. It was a real service people can use right now.

The competition was staged like a pitch night, with student teams defending their ideas and business models in front of a jury at Kinepolis, a major movie theater complex in Luxembourg City’s Kirchberg district.

A startup-style finale backed by one of Luxembourg’s biggest banks

The main prize was awarded byBanque Internationale à Luxembourg (BIL), one of the country’s best-known banks, think a major regional U.S. bank putting its name on a statewide student business championship.

Fifteen student “mini-companies” from 10 schools made the final cut, turning Letz Guess’s win into more than a feel-good headline. It beat out projects that looked more like traditional businesses, including runner-upGrillsquareand third-placeEcoffee.

The event also drew senior government officials, includingMartine Hansen, Luxembourg’s agriculture and food minister, andGeorges Mischo, the labor minister. For American readers: Luxembourg is a small European Union country, but its political leadership showing up signals this program is treated as a serious pipeline for future talent, not a school talent show.

What Letz Guess actually is: 400+ questions designed to teach Luxembourg fast

Letz Guess is a free web-based quiz game centered entirely on Luxembourg, its history, culture, and everyday landmarks. With more than400 questions, it’s built for repeat play, not a one-and-done demo.

The questions get specific. Players might be asked when Luxembourg became a duchy, how many seats are in the Grand Théâtre’s main hall, or who designed the Philharmonie Luxembourg. It’s the kind of local knowledge that helps newcomers, and even longtime residents, feel oriented quickly.

The team built the game through a “Mini-Entreprises” course at theLycée des Arts et Métiers, a technical and arts-focused high school. The group included six students (four boys and two girls), with several coming from an IT track, one reason the project wasn’t just an idea on poster board, but a functioning site.

Four languages, one country, and a smart product decision

Luxembourg runs on multiple languages the way Miami toggles between English and Spanish, except here it’s often four at once. Letz Guess is available inFrench, German, English, and Luxembourgish, matching how people actually live, study, and work in the country.

That multilingual approach also makes the game more than entertainment. Users can play in the language they’re most comfortable with, then switch to another to learn, without leaving the platform.

Building and maintaining four versions isn’t trivial. Every question has to stay consistent in meaning and difficulty across languages, which demands real coordination. Judges appeared to reward that execution as much as the concept itself.

Free to play, but not free to run: ads, sponsors, and branded questions

Letz Guess doesn’t charge users. Instead, the students pitched a digital-media business model: advertising plus roughlya dozen sponsorsthey recruited themselves.

They also offered companies a way to integrate their own questions into the quiz, branded content that’s woven into gameplay rather than slapped on as a banner ad. It’s a savvy approach for a small market, where distribution often depends on word of mouth and partnerships.

There’s a tradeoff,. Ads and sponsored content can turn users off if they get intrusive or overwhelm the experience. For a young product, that balance, free access versus sustainable revenue, can make or break growth.

Three awards, and a signal to other student teams: digital can win

By taking the top prize plus awards forsocial entrepreneurshipandmarketing strategy and campaign, Letz Guess didn’t just edge out competitors, it dominated across categories that usually split among different teams.

Other winners underscored how competitive the field was:Spongyearned a consumer protection-related prize,Rootie’swon the audience vote,Newaywas recognized for its business plan, andGrillsquarepicked up an award for financial management.

The takeaway for the next wave of student entrepreneurs is clear: a free digital product can beat more traditional “sell-a-thing” ideas, if it’s built with depth, marketed with discipline, and backed by a credible plan to pay the bills. With 400+ questions and about 12 sponsors, Letz Guess set a new bar for what a school project can look like when it’s treated like a real company.