Hun klatrer såpass langsomt at spotteren kan følge hver bevegelse.

Såpass is an adverb that means something like that much, to that degree, or so/quite.

In this pattern — såpass + adverb/adjective + at — it introduces a result:

• Hun klatrer såpass langsomt at ...
  = She climbs so slowly that ...
• In natural English, this can also come out as She climbs slowly enough that ...

So såpass does not just mean very. It points to a degree that is enough to produce the result in the at-clause.

Because langsomt is being used adverbially.

• langsom = slow (adjective)
• langsomt = slowly (adverb / adjective used as an adverb)

Here it describes how she climbs:

• Hun klatrer langsomt = She climbs slowly

This is very common in Norwegian: many adjectives get -t when used adverbially.

Compare:

• en langsom person = a slow person
• Hun beveger seg langsomt = She moves slowly

It is a result clause structure.

• såpass langsomt = so slowly / slowly enough
• at spotteren kan følge hver bevegelse = that the spotter can follow every movement

So the full structure means:

• She climbs so slowly that the spotter can follow every movement
• or more naturally in some contexts: She climbs slowly enough for the spotter to follow every movement

This pattern is very useful in Norwegian:

• Han snakker såpass høyt at alle hører ham
  = He speaks so loudly that everyone hears him
• Det er såpass kaldt at vannet fryser
  = It is so cold that the water freezes

Because after at, Norwegian uses subordinate clause word order.

In a main clause, Norwegian often has verb in second position:

• Spotteren kan følge hver bevegelse

But after at, the clause becomes subordinate, and the subject usually comes before the finite verb:

• at spotteren kan følge hver bevegelse

So:

• Main clause: Spotteren kan følge hver bevegelse
• Subordinate clause: ... at spotteren kan følge hver bevegelse

This is one of the most important word-order patterns in Norwegian.

Spotteren is the definite form of spotter.

A spotter is a person who watches and helps protect a climber, especially in bouldering or similar climbing situations. The word is a loanword and is commonly used in climbing contexts.

• en spotter = a spotter
• spotteren = the spotter

So spotteren means the spotter, probably a specific person already known from the situation.

Because the sentence refers to a specific, identifiable spotter: the spotter.

In context, there is probably one particular person spotting her, so Norwegian uses the definite form:

• spotteren = the spotter

If you said en spotter, it would sound more general:

• Hun klatrer såpass langsomt at en spotter kan følge hver bevegelse
  = She climbs so slowly that a spotter can follow every movement

That is possible grammatically, but it changes the meaning slightly. The original sentence points to a specific spotter in the situation.

Because after hver (each/every), Norwegian normally uses the singular indefinite form of the noun.

So:

• hver bevegelse = every movement
• not hver bevegelsen

This is similar to English, where we say every movement, not every the movement.

Other examples:

• hver dag = every day
• hver gang = every time
• hver person = every person

After hver, Norwegian uses a singular noun:

• hver bevegelse = each/every movement

Even though the meaning includes many movements, the grammar stays singular because you are thinking of them one by one.

If you wanted a plural idea instead, you could use something like:

• alle bevegelsene = all the movements

But hver bevegelse emphasizes each individual movement separately.

It can mean both, depending on context.

Here, følge probably means:

• follow
• keep track of
• watch closely enough to track

So spotteren kan følge hver bevegelse means the spotter is able to visually track everything she does.

This is a normal use of følge in Norwegian.

Compare:

• Jeg følger bilen med blikket = I follow the car with my eyes
• Det er vanskelig å følge hva han sier = It is hard to follow what he is saying

Because Norwegian usually uses the simple present where English often uses the present continuous.

• Hun klatrer can mean:
  • She climbs
  • She is climbing

The exact meaning depends on context.

Norwegian does have ways to emphasize an ongoing action, such as:

• Hun holder på å klatre = She is in the middle of climbing

But in ordinary sentences, Hun klatrer is the normal and natural choice.

Yes, you could.

• så langsomt at = so slowly that
• såpass langsomt at = so/that slowly that, often with a slightly more colloquial or nuanced sense of to that extent

Both are possible, but såpass often sounds a bit more conversational and can suggest slow enough to that degree.

Also compare:

• langsomt nok til at spotteren kan følge hver bevegelse
  = slowly enough for the spotter to follow every movement

So there are a few natural ways to express this idea in Norwegian.

No, not in normal Norwegian here.

In this sentence, at is the conjunction that introduces the result clause:

• Hun klatrer såpass langsomt at spotteren kan følge hver bevegelse

If you remove at, the sentence becomes ungrammatical.

This is different from some informal English patterns where that can sometimes be omitted. In Norwegian, at is normally required in this kind of clause.

It functions as an adverbial phrase describing how she climbs.

Breakdown:

• Hun = subject
• klatrer = verb
• såpass langsomt = adverbial phrase of manner/degree
• at spotteren kan følge hver bevegelse = result clause

So the main clause is:

• Hun klatrer såpass langsomt

And then the at-clause explains the consequence of that slowness.