Programendringen kommer over sambandsradioen.

Because Norwegian usually writes compound nouns as a single word.

So programendringen is built from:

• program = program
• endring = change
• -en = the definite ending

The base noun is programendring = program change, and programendringen = the program change.

This is very common in Norwegian. Where English often uses two words, Norwegian often uses one:

• togstasjon = train station
• skolebok = school book / textbook
• programendring = program change

The ending -en is the suffixed definite article, meaning the.

In Norwegian, instead of putting the in front of many nouns, you usually add the definite ending to the noun itself.

So:

• en programendring = a program change
• programendringen = the program change

The last part of the compound, endring, determines how the whole compound is inflected. Since endring is a noun that can take the definite form -en, the full compound becomes programendringen.

Yes, kommer literally means comes, from the verb å komme = to come.

But in this sentence, it is being used in a slightly broader way, like English sometimes does in expressions such as:

• The message came over the radio
• The news came through the radio

So kommer here does not mean that the program change is physically moving. It means that the information is being received or transmitted through that communication channel.

No. Here over means something like:

• via
• through
• over the airwaves
• by means of

So over sambandsradioen means that the information is coming through the communications radio system.

This is similar to English:

• We heard it over the radio
• The order came over the intercom

So in this sentence, over is about the medium of communication, not physical position.

Sambandsradioen is another compound noun.

It consists of:

• samband = communications link / communication connection
• radio = radio
• -en = the definite ending

So sambandsradioen means something like:

• the communications radio
• the radio link
• the two-way radio system

The exact English wording depends on context. It often suggests an official or operational radio system, such as one used by the military, emergency services, transport, or other organized communication.

For the same reason as programendringen: it is in the definite form.

So:

• en sambandsradio = a communications radio
• sambandsradioen = the communications radio

The sentence is talking about a specific radio system, probably one already known in the situation. That is why the definite form is used.

Because the sentence refers to specific things:

• programendringen = the program change
• sambandsradioen = the communications radio

In context, this usually means:

• there is a particular program change being talked about
• there is a particular radio channel or system through which the message is coming

This is very natural in Norwegian. English and Norwegian do not always use definiteness in exactly the same way, but here the definite form sounds normal in both languages.

The sentence has normal Norwegian main-clause word order:

• Programendringen = subject
• kommer = finite verb
• over sambandsradioen = prepositional phrase

So the pattern is:

Subject + verb + adverbial/prepositional phrase

That is the standard order in a simple statement.

If you moved another element to the front, Norwegian would still keep the verb in second position:

• Over sambandsradioen kommer programendringen.

That version is possible, but it sounds more marked or stylistic. The original sentence is the most neutral.

Yes, via sambandsradioen is possible and would be understandable.

But there is a small difference in feel:

• over sambandsradioen sounds very natural for something being heard or transmitted by radio
• via sambandsradioen sounds a bit more formal or technical

So over is often the more idiomatic choice in this kind of sentence.

Yes, kommer is present tense.

In Norwegian, present tense can be used:

• for something happening now
• for something that regularly happens
• for a vivid description of an event

So this sentence could mean:

• the program change is being announced over the radio now or
• program changes are conveyed that way in this situation

The exact interpretation depends on context, just as it often does in English.

No, not in standard Norwegian.

You should write:

• programendring
• programendringen

not:

• program endring
• program endringen

Norwegian strongly prefers compound nouns to be written together. Writing them separately often looks wrong or can even create a different meaning.