"Hoe kunnen wij reclame maken op internet?"
Translation:How can we advertise on the internet?
In dutch and french, we can write het internet and internet. Is it also possible in English?
No, in English it's always the internet. Or the web. If you want to use a word that doesn't need a definite article, you can use online (I looked it up online, for example).
It sounds quite funny to use an article in french. I always find it interesting that English are so fancy about this word