Foreldrepengeperioden er lang.

Because Norwegian makes compound nouns by joining words together.

Here, foreldrepengeperioden is built as one compound, not as several separate words. That is very normal in Norwegian.

The main idea is:

• foreldrepenger = parental benefit / parental pay
• periode = period
• together: foreldrepengeperiode = parental-benefit period
• definite form: foreldrepengeperioden = the parental-benefit period

In English, we often write these parts separately. In Norwegian, they are usually written as one word.

A useful breakdown is:

• foreldre = parents
• penger = money
• foreldrepenger = parental benefit/pay
• periode = period
• -en = the definite ending for a common-gender singular noun

So:

• foreldrepengeperiode = parental-benefit period
• foreldrepengeperioden = the parental-benefit period

The last part, periode, is the head of the compound. That means it decides the grammatical gender and inflection of the whole word.

Because in Norwegian, the is often added to the end of the noun instead of appearing as a separate word before it.

So:

• en foreldrepengeperiode = a parental-benefit period
• foreldrepengeperioden = the parental-benefit period

The ending -en is the definite article here.

This is one of the biggest differences from English.

It is a common gender noun.

That is because the head word is periode, and en periode is common gender.

So the forms are:

• en foreldrepengeperiode = indefinite singular
• foreldrepengeperioden = definite singular

Because it is common gender singular, the adjective in this sentence is lang, not langt.

Because the adjective agrees with the noun.

Here, the noun is:

• singular
• common gender

So the adjective form is lang.

Compare:

• Perioden er lang. = The period is long.
• Huset er langt. = The house is long.
  
  • hus is neuter, so you get langt
• Periodene er lange. = The periods are long.
  
  • plural gives lange

So in Foreldrepengeperioden er lang, lang is the correct form.

Because lang is an adjective, while lenge is usually an adverb.

In this sentence, the word describes the noun foreldrepengeperioden, so you need an adjective:

• Foreldrepengeperioden er lang. = The parental-benefit period is long.

But lenge is used in expressions about time spent doing something:

• Jeg ventet lenge. = I waited a long time.
• Han har jobbet lenge. = He has worked for a long time.

So:

• describing a noun -> lang
• describing duration of an action -> lenge

Er is the present tense of å være, which means to be.

So:

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

In this sentence:

• Foreldrepengeperioden er lang. = The parental-benefit period is long.

Norwegian does not change the present-tense form of the verb for different persons:

• jeg er
• du er
• han er
• vi er

So er is always the same in the present tense.

This sentence has normal Norwegian main-clause word order:

• Foreldrepengeperioden = subject
• er = verb
• lang = subject complement

So the pattern is:

• subject + verb + complement

That is very similar to English here:

• The parental-benefit period is long.

A useful extra point: Norwegian main clauses follow the verb-second rule. That means the finite verb is usually in the second position.

For example:

• Foreldrepengeperioden er lang.
• I Norge er foreldrepengeperioden lang.

Even when another element comes first, er still stays in second position.

The indefinite singular form is:

• en foreldrepengeperiode

So you can compare:

• en foreldrepengeperiode = a parental-benefit period
• foreldrepengeperioden = the parental-benefit period

Other useful forms are:

• en foreldrepengeperiode = indefinite singular
• foreldrepengeperioden = definite singular
• foreldrepengeperioder = indefinite plural
• foreldrepengeperiodene = definite plural

This is helpful because Norwegian learners often want to see the whole pattern, not just the form used in one sentence.

In compounds, Norwegian normally puts the main stress near the beginning of the whole word, not on the last part the way English sometimes does.

So in foreldrepengeperioden, the strongest stress comes early in the word.

You do not need perfect pronunciation right away, but it helps to think of it as one unit rather than several separate words.

A practical learner tip:

• say it slowly at first
• keep it as one compound
• do not pause between the parts

So it is better to think:

• foreldrepengeperioden

rather than trying to pronounce each piece as if it were a separate English-style phrase.