Die besluit bly, hetsy die mosie gewysig word hetsy nie.

It means whether ... or not.

So hetsy die mosie gewysig word hetsy nie means whether the motion is amended or not.

This is a fairly formal construction, and you are likely to see it in legal, official, or academic Afrikaans.

Because this is a paired construction.

Afrikaans often uses hetsy ... hetsy ... to present two alternatives, much like whether ... or ... in English. In this sentence, the second part is shortened to hetsy nie, which gives the sense of or not.

So the pattern is:

• hetsy X hetsy nie = whether X or not

Because hetsy introduces a subordinate clause, and in Afrikaans subordinate clauses the finite verb usually goes to the end.

Compare:

• Main clause: Die mosie word gewysig.
• Subordinate clause: ... dat / as / wanneer / hetsy die mosie gewysig word

In the passive, Afrikaans uses:

• gewysig = past participle
• word = passive auxiliary

In a subordinate clause, that auxiliary word moves to the end, so you get gewysig word.

Here word is functioning as a passive auxiliary, not mainly as becomes.

So:

• Die mosie word gewysig = The motion is being amended / is amended
• word helps form the passive
• gewysig carries the main lexical meaning

English speakers often first learn word as become, but in Afrikaans it is also very commonly used to form the passive.

Gewysig is the past participle of wysig, which means amend, modify, or change.

So:

• wysig = to amend / modify
• gewysig = amended / modified

In this sentence, gewysig is part of the passive verb phrase gewysig word.

Because this is not a normal full negative sentence like Hy kom nie vandag nie.

Here nie belongs to the fixed expression hetsy ... hetsy nie, meaning whether ... or not. It is not the same kind of sentence negation that triggers the usual two-part nie ... nie pattern.

So you should think of hetsy nie as part of the whole expression, not as an ordinary negative clause.

Bly literally means remain or stay.

In this sentence, Die besluit bly means that the decision remains in force, still holds, or stands.

So this is not about physically staying somewhere. It is about something continuing to be valid.

Because both nouns are definite:

• die besluit = the decision
• die mosie = the motion

A useful thing to remember is that Afrikaans uses die for the in both singular and plural, and it does not change for gender.

So:

• die besluit = the decision
• die besluite = the decisions
• die mosie = the motion
• die mosies = the motions

They are related, but they are not the same thing.

• mosie = motion
  A proposal formally put forward, especially in a meeting or parliament.

• besluit = decision / resolution
  The outcome that stands or has been adopted.

So the sentence is saying that the decision remains valid, regardless of whether the motion is amended.

Yes, it sounds quite formal and official.

Words and structures like hetsy and mosie are common in formal writing, meeting language, legal language, or parliamentary language.

In everyday speech, people might choose a simpler wording. But the sentence you have is perfectly good Afrikaans, especially in formal contexts.

Yes. The comma separates the main clause from the following subordinate or qualifying clause.

• Main clause: Die besluit bly
• Following clause: hetsy die mosie gewysig word hetsy nie

This kind of punctuation is normal in formal written Afrikaans and helps readability.

Yes. Bly staan is a common, slightly more explicit way to say that something remains in force or still stands.

So:

• Die besluit bly = The decision remains / stands
• Die besluit bly staan = The decision remains in force / still stands

In your sentence, bly on its own is acceptable, especially in a formal style where the meaning is clear from context.