Die netwerk is stadig.

Die is the Afrikaans definite article, meaning the.

A very useful thing for English speakers: Afrikaans does not change the article for gender the way German does. So die can be used for singular and plural nouns:

• die netwerk = the network
• die netwerke = the networks

In this sentence, Die is capitalized only because it is at the beginning of the sentence.

It is capitalized simply because it starts the sentence.

In the middle of a sentence, it would normally be lowercase:

• Ek dink die netwerk is stadig. = I think the network is slow.

So die is not a noun here, just the ordinary word for the.

Yes. Netwerk is a close cognate of English network.

The main difference is spelling:

• English: network
• Afrikaans: netwerk

This kind of similarity is very common in Afrikaans and can make reading easier for English speakers.

Because stadig is a predicate adjective here, meaning it comes after the verb is.

In Afrikaans, adjectives often look different depending on where they appear:

• Die netwerk is stadig. = The network is slow.
  Here stadig comes after is, so it stays plain.

• die stadige netwerk = the slow network
  Here the adjective comes before the noun, so it often takes -e.

So:

• after is: stadig
• before a noun: stadige

It is a normal statement sentence with the basic order:

subject + verb + adjective/complement

So here:

• Die netwerk = subject
• is = verb
• stadig = complement/adjective

This is very similar to English:

• The network / is / slow

That makes this sentence especially easy for English speakers to understand.

You usually make it a yes/no question by putting the verb first:

• Is die netwerk stadig? = Is the network slow?

This verb-first pattern is very common in Afrikaans questions.

Afrikaans normally uses a double nie pattern in ordinary negation:

• Die netwerk is nie stadig nie. = The network is not slow.

So the pattern is:

subject + verb + nie + rest + nie

That double nie is one of the most important Afrikaans grammar patterns to learn.

Roughly, stadig sounds like STAA-dikh or STAH-dikh, depending on accent.

A few helpful points:

• The a is broad, not like the a in cat
• The final g is the typical Afrikaans guttural sound, similar to the ch in Scottish loch or German Bach
• The stress is usually on the first syllable: STA-dig

If you cannot make the guttural g yet, that is very common for beginners.

In a sentence like this, yes, stadig means slow.

Depending on context, it can also carry the idea of slowly or at a slow pace in related usage, but here it is clearly describing the network’s speed:

• Die netwerk is stadig. = The network is slow.

So in this sentence, think of it as a plain adjective: slow.

Yes. Netwerk can refer to a network in different contexts, just like English network.

Depending on the situation, it could mean:

• a computer network
• an internet/network connection
• a social or organizational network

In everyday modern use, many people would understand Die netwerk is stadig as something like The network is slow or The connection is slow, especially in a tech context.

The plural of netwerk is usually netwerke.

So:

• die netwerk = the network
• die netwerke = the networks

Example:

• Die netwerke is stadig. = The networks are slow.

Notice that die stays the same, which is another nice feature of Afrikaans.

Yes, if that is what you specifically mean.

For example:

• Die internet is stadig. = The internet is slow.
• Die netwerk is stadig. = The network is slow.

Internet is more specific. Netwerk can be broader and may refer to a local network, mobile network, company network, and so on.

Yes, it is completely natural and idiomatic.

It is short, clear, and very typical of everyday Afrikaans:

• Die netwerk is stadig.

A speaker might also say something more specific depending on context, such as:

• Die internet is stadig.
• Die Wi-Fi is stadig.
• Die verbinding is stadig.

But your original sentence is perfectly normal.