Jeg vil videresende invitationen til min mor, så hun også kan se datoen.

Vil is a modal verb, and in Danish it can cover several ideas:

• future: I will
• willingness/intention: I want to / I intend to

In Jeg vil videresende invitationen..., it often sounds like an intention: I’m going to / I want to forward the invitation.

A useful point for learners: Danish often uses the present tense for future meaning, so vil is not always required just to talk about the future. Using vil adds a sense of intention or decision.

After Danish modal verbs such as:

• vil
• kan
• skal
• må
• bør

the next verb normally appears in the infinitive without at.

So:

• Jeg vil videresende invitationen.
• Hun kan se datoen.

not:

• Jeg vil at videresende...
• Hun kan at se...

This is very similar to English I will send, she can see, where you also do not add to after a modal.

Yes, videresende is a normal Danish verb meaning forward or send on.

It is built from:

• videre = on / further
• sende = send

You can often also say sende videre, and both are natural in many contexts.

For example:

• Jeg vil videresende invitationen.
• Jeg vil sende invitationen videre.

The one-word form videresende is very common in written and digital contexts, especially for things like emails, messages, and invitations.

Because Danish usually puts the definite article at the end of the noun.

So:

• en invitation = an invitation
• invitationen = the invitation

and:

• en dato = a date
• datoen = the date

Both invitation and dato are common gender nouns, so their definite ending is -en.

This is one of the biggest differences from English: Danish often does not use a separate word like the in simple noun phrases.

Because a possessive like min already makes the noun definite.

So:

• min mor = my mother
• din mor = your mother
• hans mor = his mother

You do not add another definite marker in this kind of phrase.

So these are wrong:

• min moren
• den min mor

This is similar to English: you say my mother, not the my mother.

Here så means so or so that.

In this sentence, it introduces the reason/purpose behind the first action:

• Jeg vil videresende invitationen til min mor, så hun også kan se datoen.
• I want to forward the invitation to my mother so that she can also see the date.

So the idea is:

1. I forward the invitation.
2. As a result / for that purpose, my mother can see the date too.

Because this så introduces a subordinate clause, and subordinate clauses in Danish have different word order from main clauses.

Here the order is:

• så
  • subject
    • adverb
      • finite verb
• så hun også kan se datoen

That is why you get:

• hun også kan

not:

• kan hun også

Compare:

Main clause word order

• Hun kan også se datoen.

Subordinate clause word order

• ... så hun også kan se datoen.

This is a very common Danish pattern, and learning to spot main-clause vs. subordinate-clause word order is important.

Because in subordinate clauses, adverbs like også often come before the finite verb.

So in this sentence:

• så hun også kan se datoen

the adverb også comes before kan.

In a main clause, you would more naturally get:

• Hun kan også se datoen.

So the placement of også is tied to the same word-order difference mentioned above.

Also, også here means also / too, showing that the mother, in addition to someone else, will be able to see the date.

Kan se means can see / be able to see, and it fits the idea of purpose very well.

The sentence is not just saying that she sees the date as a fact. It is saying that forwarding the invitation will make it possible for her to see it.

So:

• så hun også kan se datoen = so that she can also see the date

If you said:

• så hun også ser datoen

it would sound more like so that she also sees the date as an outcome or event, not as clearly about ability/access. In this context, kan is the most natural choice.

In written Danish, this depends on the comma system being used.

With start comma, you write:

• Jeg vil videresende invitationen til min mor, så hun også kan se datoen.

Without start comma, many writers would omit that comma:

• Jeg vil videresende invitationen til min mor så hun også kan se datoen.

So you may see both in real Danish writing.

The important grammar point is that så hun også kan se datoen is a separate clause attached to the main clause.

Normally, no—not in the same natural way.

For at is most commonly used before an infinitive, especially when the subject stays the same:

• Jeg åbner invitationen for at se datoen.
• I open the invitation to see the date.

But in your sentence, the subject changes:

• jeg in the first clause
• hun in the second clause

When the subject changes, Danish usually prefers så (at)-type structures:

• ... så hun også kan se datoen.

So for this sentence, så hun også kan se datoen is the idiomatic choice.

Yes. Til is the normal preposition for movement or transfer to someone.

So:

• sende noget til nogen = send something to someone
• videresende invitationen til min mor = forward the invitation to my mother

This is the standard pattern. Danish does not use an indirect-object structure here in the same way English sometimes can. English allows both:

• send my mother the invitation
• send the invitation to my mother

In Danish, the version with til is the normal one here:

• sende invitationen til min mor