Mikä se on? vs. Mitä se on?

“Mikä se on?” or “Mitä se on?” – What’s the difference? The interrogatives ‘mitä’ and ‘mikä’ can be tough, but here’s a video that explains the choice between those two questions.
Why on earth? Why the h***?

When you don’t understand why someone is doing what they’re doing, you can express your confusion or perplexity in English by saying “Why on earth?” Read on to find out how to say this in Finnish and how to tweak this sentence further. (NB! The end of the article contains swear words, both in the text and the audio.)
For beginners: an introduction to the Finnish personal pronouns

Are you a beginner in Finnish? Check out these 3 forms for the personal pronouns. Trust me, you will need them.
The Finnish 3rd infinitive: verb stem + -MAAN, -MASSA, -MASTA

You may have seen Finnish verb forms like syömään, syömässä and syömästä. These are the 3 most common ones out of the 5 different varieties of the 3rd infinitive.
Talking about hobbies and interests in Finnish

You’ve probably heard the noun harrastus before, right? It means ‘hobby’. But what about the verb harrastaa?
Kuulla vai kuunnella?

What is the difference between the Finnish verbs KUULLA and KUUNNELLA?
What’s the difference between the partitive and the accusative in these Finnish sentences?
So you’ve figured out when to use the accusative and when to choose the partitive. But wait, what’s that? There are two types of accusative?
Akkusatiivi vai partitiivi?
Check out these example sentences to find out more about when to use the accusative or the partitive case.