Vi begynder ikke mødet, før alle har logget ind.

Begynde is the infinitive, meaning to begin.
In this sentence, the verb is in the present tense: begynder = begin / are beginning.

Danish present tense is usually formed with -r, and it does not change for different persons:

• jeg begynder
• du begynder
• vi begynder
• de begynder

So Vi begynder is simply we begin / we are beginning.

Danish very often uses the present tense to talk about the future when the context makes the time clear.
So Vi begynder ikke mødet can naturally mean We are not starting / will not start the meeting.

That is very common in Danish. In fact, using vil here could add a slightly different nuance, because vil can also suggest want to or intend to.

So this sentence sounds natural and idiomatic without any special future word.

In a normal Danish main clause, ikke usually comes after the finite verb.

So:

• Vi begynder ikke mødet

not:

• Vi ikke begynder mødet

This is one of the basic word-order patterns in Danish main clauses.
The finite verb tends to come early, and negation like ikke follows it.

A useful pattern is:

• subject + finite verb + ikke + other elements

So here:

• Vi = subject
• begynder = finite verb
• ikke = negation
• mødet = object

Because mødet is the definite form: the meeting.

Danish usually adds the definite article to the end of the noun:

• et møde = a meeting
• mødet = the meeting

So the sentence is talking about a specific meeting, not just any meeting.

Also note that møde is a neuter noun, which is why the definite ending is -et.

This is a very common point of confusion.

In Danish, after a negative main clause, før is often used where English would use until.

So:

• Vi begynder ikke mødet, før alle har logget ind

is the natural Danish way to say We won’t start the meeting until everyone has logged in.

Even though før often means before, in this kind of structure it matches English until very well.
So this is not strange Danish grammar; it is standard and very common.

Because før introduces a subordinate clause.

In Danish subordinate clauses, the word order is different from main clauses. The subject normally comes before the finite verb:

• før alle har logget ind

not:

• før har alle logget ind

So after før, the clause keeps normal subordinate-clause order:

• alle = subject
• har = finite verb
• logget ind = rest of the verb phrase

This is an important contrast in Danish:

• main clause: verb often comes early
• subordinate clause: subject usually comes before the finite verb

Har logget ind is the present perfect.

It is built like this:

• har = present tense of at have
• logget = past participle of at logge
• ind = particle, part of the phrasal verb

This tense shows that the logging-in must be completed before the meeting starts.
So the sentence is not just about the action happening; it is about the action being finished.

That is why the perfect tense is a good fit here.

Because at logge ind is a phrasal verb, similar to English to log in.

The verb is logge, and ind is a particle that belongs with it. In Danish, these are often written as separate words:

• at logge ind
• logger ind
• har logget ind

So ind is not random; it is part of the whole verbal expression.

Alle here means everyone / everybody or all people.

A native English speaker may expect a distinction like everyone has versus all have, but Danish verbs do not change form according to person or number in the present tense. So the same form is used with different subjects:

• jeg har
• du har
• vi har
• alle har

So alle har is completely normal. The verb form stays the same regardless of whether the subject is singular-like or plural-like in meaning.