Learn Danish: Jeg skriver fire kort på dansk. - I am writing four cards in Danish.

In Danish, many short, one-syllable et words (neuter nouns) do not change in the plural. Since 'a card' is et kort, 'four cards' is just fire kort.

Why is it på dansk instead of using the Danish word for 'in'?

When talking about speaking, writing, or reading in a language, Danish always uses the preposition på instead of translating 'in' directly. You write på dansk.

Shouldn't dansk be capitalized?

Unlike in English, the names of languages and nationalities are not capitalized in Danish. Therefore, 'Danish' is simply written as dansk.

How do we know skriver means 'am writing' and not 'write'?

Danish does not have a separate tense for actions happening right now. The present tense verb skriver covers both 'write' and 'am writing'. The context tells you which one it is.