Arrangören är nervös inför evenemanget.

In Swedish, the is very often attached to the end of the noun instead of appearing as a separate word.

• arrangör = organizer
• arrangören = the organizer

and

• evenemang = event
• evenemanget = the event

So both nouns in this sentence are in the definite form.

The dictionary form is arrangör, which means organizer or arranger.

The ending -en makes it definite singular:

• en arrangör = an organizer
• arrangören = the organizer

Also, arrangör is not specifically male or female. It is gender-neutral in meaning.

That is because evenemang is an ett-word (a neuter noun), not an en-word.

In Swedish:

• ett evenemang = an event
• evenemanget = the event

A very common pattern is:

• en-word singular definite -> -en
• ett-word singular definite -> -et

So:

• arrangören uses -en
• evenemanget uses -et

Here, inför means something like:

• before
• ahead of
• in anticipation of

So nervös inför evenemanget means the organizer feels nervous because the event is coming up.

This is slightly different from just a simple time word like innan (before) in some contexts. Inför often has a sense of facing or preparing for something upcoming.

For example, it is very natural in sentences about feelings or preparation:

• Hon är nervös inför provet. = She is nervous before/about the test.
• Vi förbereder oss inför resan. = We are preparing for the trip.

Because nervös is a predicate adjective here, and in Swedish predicate adjectives agree with the subject.

With a singular en-word subject, the basic form is used:

• Arrangören är nervös. = The organizer is nervous.

Compare:

• Barnet är nervöst. = The child is nervous.
  (singular ett-word -> nervöst)

• Arrangörerna är nervösa. = The organizers are nervous.
  (plural -> nervösa)

So nervös is correct because arrangören is singular and is an en-word.

Är is the present tense of vara, which means to be.

So:

• är = is / are / am, depending on context

In this sentence:

• Arrangören är nervös = The organizer is nervous

Swedish uses the same present-tense form är for all persons:

• jag är = I am
• du är = you are
• han/hon är = he/she is
• vi är = we are

Yes. That is a very natural English translation.

Depending on context, inför evenemanget could be rendered as:

• before the event
• ahead of the event
• about the event

If the focus is on emotional anticipation, about the event often sounds most natural in English. If the focus is more on timing, before the event or ahead of the event may fit better.

Yes, Swedish word order can change, especially if you move a time or prepositional phrase to the front.

For example, you can also say:

Inför evenemanget är arrangören nervös.

That still means the same thing: Ahead of the event, the organizer is nervous.

Notice that when inför evenemanget moves to the front, the verb är still stays in second position. This is part of the Swedish V2 word-order pattern.

So:

• Arrangören är nervös inför evenemanget.
• Inför evenemanget är arrangören nervös.

Both are correct.

They are similar, but not always identical.

• arrangör usually refers to the person or group putting on an event, performance, or activity
• organisatör can mean organizer in a broader sense, including someone who organizes things in general

In a sentence about an event, arrangör is very natural because it specifically fits the idea of someone responsible for arranging or hosting that event.