Sy gaan die bewysfoto na ten einde die appèl te verwerp.

Not here. In this sentence, gaan ... na is the split verb nagaan, which means check, review, inspect, or go over.

So:

• Sy gaan die bewysfoto na = She checks/reviews the evidence photo.

If gaan were just the future auxiliary, you would normally expect another main verb later, for example:

• Sy gaan die bewysfoto nagaan = She is going to check the evidence photo.

So the na is the clue that this is the verb nagaan, not just a future construction.

Because nagaan is a separable verb.

In Afrikaans, some verbs consist of:

• a main verbal part
• plus a particle such as na, op, af, uit, etc.

When the verb is finite in a main clause, the particle often moves to the end:

• Sy gaan die bewysfoto na.

But in the infinitive or past participle, it is usually written together:

• om die bewysfoto na te gaan
• Sy het die bewysfoto nagegaan

This is a very common pattern in Afrikaans.

Here ten einde means in order to or with the aim of.

It introduces a purpose:

• ten einde die appèl te verwerp = in order to reject the appeal

This expression is quite formal. You are more likely to see it in:

• legal writing
• official documents
• formal reports

In everyday Afrikaans, speakers often use om ... te instead.

Because after ten einde, Afrikaans normally uses te + infinitive.

So:

• ten einde ... te verwerp = in order to reject

The word te works a lot like English to before an infinitive.

Compare:

• om te lees = to read
• probeer te help = try to help
• ten einde te verwerp = in order to reject

In your sentence, the object die appèl comes before the infinitive:

• ten einde die appèl te verwerp

Bewysfoto is a compound noun:

• bewys = proof / evidence
• foto = photo

Afrikaans usually writes compound nouns as one word, much like Dutch and German often do.

So:

• bewysfoto = evidence photo / proof photo

This is very normal in Afrikaans. The last part is usually the main noun, and the earlier part describes it.

Examples:

• polisiefoto = police photo
• hofsaak = court case
• bewysstuk = piece of evidence

The accent in appèl helps distinguish it from appel.

• appèl = appeal
• appel = apple

So the accent is important here because it changes the meaning. It also helps indicate pronunciation.

This is one of the useful things accents do in Afrikaans: they can show stress or distinguish between words that would otherwise look identical.

Because die is the normal definite article in Afrikaans for nouns like these.

Afrikaans does not have grammatical gender in the article system the way some other languages do. So you do not have to learn separate words for the like masculine/feminine/neuter forms.

Here:

• die bewysfoto = the evidence photo
• die appèl = the appeal

The same article is used in both cases.

Here Sy means she.

So:

• Sy gaan ... = She checks/goes over ...

But sy can also mean his when it is used possessively:

• sy foto = his photo

So context matters.

A useful shortcut is:

• if sy comes before a verb, it is often she
• if sy comes before a noun, it is often his

In your sentence, Sy is followed by gaan, so it clearly means she.

The sentence follows normal Afrikaans main-clause word order.

Breakdown:

• Sy = subject
• gaan = finite verb in second position
• die bewysfoto = direct object
• na = separated particle from nagaan
• ten einde die appèl te verwerp = purpose phrase

So the structure is roughly:

• Subject + finite verb + object + separated particle + purpose phrase

That is why you get:

• Sy gaan die bewysfoto na ten einde die appèl te verwerp.

For an English speaker, the unusual part is often that the particle na comes after the object.

Yes, very much so.

Two things make it sound formal:

• ten einde is formal and often legal/official
• appèl and verwerp also fit a legal or administrative style

So this sounds like something from:

• a legal document
• a court summary
• an official report

A more everyday sentence would often replace ten einde with om. The original version is correct, but it has a clearly formal tone.