I dag lærer vi ordet "mon", som ofte bruges i spørgsmål.

Because Danish main clauses usually follow the verb-second rule.

When I dag comes first, it takes the first position in the sentence, so the finite verb lærer must come next:

• I dag lærer vi ordet mon ...

If the subject comes first, then you get:

• Vi lærer ordet mon i dag.

Both are grammatical, but the first version puts extra focus on today.

Danish often uses the simple present where English uses either the simple present or the present continuous.

So:

• I dag lærer vi ...

can naturally mean:

• Today we learn ...
• Today we are learning ...

In this context, English usually prefers are learning, but Danish does not need a special continuous form.

Ordet means the word.

The base noun is:

• et ord = a word

Because ord is a neuter noun, the definite form is made by adding -et:

• ord → ordet

So:

• ordet mon = the word mon

This is a very common Danish pattern:

• et hus → huset
• et spørgsmål → spørgsmålet

Because mon is being mentioned as a word, not used in its normal grammatical function.

In English, we do the same thing:

• the word if
• the word hello
• the word mon

So in Danish:

• ordet mon

means the word mon.

You do not need an extra article before mon here.

Here som means which or that.

It introduces a relative clause:

• ordet mon, som ofte bruges i spørgsmål
• the word mon, which is often used in questions

So som connects the noun mon to extra information about it.

A very literal breakdown is:

• som = which/that
• ofte = often
• bruges = is used
• i spørgsmål = in questions

Bruges is the present passive form of bruge (to use).

So:

• bruger = uses / use
• bruges = is used / are used

In this sentence:

• som ofte bruges i spørgsmål
• which is often used in questions

Danish very often forms the passive with -s, especially in general statements like this one.

Because the sentence is talking about questions in general, not one specific question or a specific set of questions.

So:

• i spørgsmål = in questions
• i et spørgsmål = in a question
• i spørgsmålene = in the questions

Also, spørgsmål has the same form in singular and plural when indefinite, so the context tells you the meaning. Here it clearly means questions in a general sense.

Mon is used to add a feeling of wondering, uncertainty, or speculation.

It often sounds like:

• I wonder...
• Could it be...
• Do you think...

For example:

• Hvor er han mon? = I wonder where he is.
• Hvad betyder det mon? = What could that mean, I wonder?

It is especially common in open questions where the speaker is guessing or thinking out loud. It does not simply make a sentence a question; it adds a particular tone.

No. It is used in questions where the speaker is wondering or speculating.

It sounds natural in sentences like:

• Hvor er hun mon?
• Hvem kommer mon først?

But it is not just a general question marker. If you ask a plain factual question, mon may sound odd or too reflective.

So the sentence is right to say that mon is often used in questions, not that it is used in every question.

Yes.

For example:

• I dag lærer vi ordet mon.
• Vi lærer ordet mon i dag.

Both are possible, but the emphasis changes:

• I dag first: stronger focus on today
• i dag later: more neutral

This is a common feature of Danish word order. Moving an element to the front often changes emphasis and triggers inversion, which is why you then get lærer vi.