Underretningen forklarer klageretten og klagefristen.

Because -en is the definite singular ending for many masculine nouns in Norwegian Bokmål.

• en underretning = a notification
• underretningen = the notification

So Underretningen forklarer ... means The notification explains ...

Even though underretning ends in -ing, it is commonly treated as a masculine noun in Bokmål, so you often see en underretning and underretningen.

In Norwegian, the definite article is usually attached to the end of the noun instead of appearing as a separate word before it.

Compare:

• a car → en bil
• the car → bilen

So:

• underretning = notification
• underretningen = the notification

This is one of the biggest differences from English.

Forklarer is the present tense of å forklare = to explain.

A very useful feature of Norwegian is that verbs do not change according to the subject the way they do in English.

For example:

• jeg forklarer = I explain / I am explaining
• du forklarer = you explain
• han forklarer = he explains
• underretningen forklarer = the notification explains

The verb stays forklarer in all of these.

Because Norwegian very often forms compound nouns by joining words together into a single word.

Here:

• klage = complaint / appeal
• rett = right
• frist = deadline / time limit

So:

• klagerett = right to complain / right of appeal
• klagefrist = appeal deadline / complaint deadline

And in the sentence they appear in the definite form:

• klageretten = the right of appeal
• klagefristen = the appeal deadline

English often uses separate words where Norwegian prefers one compound noun.

Literally, it is the complaint-right, but in natural English it usually means:

• the right to appeal
• the right to complain
• in legal/administrative contexts, the right of appeal

The exact translation depends on context. In official letters, klagerett usually refers to your legal right to challenge a decision.

Klagefristen means the deadline for submitting a complaint or appeal.

It is made from:

• klage = complaint / appeal
• frist = deadline / time limit

So in official language, this often means the date or time period within which you must file an appeal.

Because the Norwegian verb å forklare can take a direct object without a preposition.

So:

• forklare noe = explain something

That is why Norwegian says:

• Underretningen forklarer klageretten og klagefristen

Literally structured as:

• The notification explains the right of appeal and the appeal deadline

In English, explain also works directly with an object, so this part matches English fairly well.

This is the normal Norwegian main clause pattern:

subject + verb + rest

So here:

• Underretningen = subject
• forklarer = verb
• klageretten og klagefristen = object

This is the standard word order for a simple statement in Norwegian, just like English:

• The notification explains the right of appeal and the appeal deadline

Because the sentence is talking about specific things: the right of appeal and the deadline.

In official or legal writing, this is very common. The document is not talking about appeal rights or deadlines in general, but about the particular ones relevant to the case.

So:

• klagerett = a right of appeal

• klageretten = the right of appeal

• klagefrist = an appeal deadline
• klagefristen = the appeal deadline

This sentence is in Bokmål.

Clues include forms like:

• Underretningen
• forklarer
• og

A Nynorsk version might use somewhat different vocabulary or forms depending on style, for example meldinga or underretninga in some contexts, though official phrasing can vary.

Not especially in casual everyday speech. It sounds fairly formal and administrative.

In ordinary language, people might more often say things like:

• melding = message / notice
• brev = letter
• beskjed = message / notice

But in official, legal, or bureaucratic contexts, underretning fits well and means something like notification or formal notice.

A rough approximation for an English speaker is:

OON-der-ret-ning-en for-KLAR-er KLA-ge-ret-en og KLA-ge-frist-en

A few tips:

• r in Norwegian is usually clearer than in English
• g in klage is pronounced
• the stress in forklarer falls on klar
• the stress in klageretten and klagefristen is on the first syllable: KLA-

This is only an approximation, but it can help you get started.