Die sonbrandroom is in die rugsak.

Because die is the Afrikaans definite article, meaning the. It is used before both sonbrandroom and rugsak because both nouns are definite:

• die sonbrandroom = the sunscreen / the sun lotion
• die rugsak = the backpack

Unlike English, Afrikaans uses the same definite article die for all nouns. It does not change for gender.

Yes. Afrikaans very often writes compound nouns as a single word. So:

• son = sun
• brand = burn
• room = cream

Together, sonbrandroom literally means something like sunburn cream, but it is used for sunscreen / sun cream / sun lotion, depending on context.

This is very normal in Afrikaans, and native speakers expect it to be written as one word.

Literally, rugsak is made up of:

• rug = back
• sak = bag

So it literally means back-bag, which corresponds to English backpack.

This is the normal word order for a simple statement in Afrikaans:

• Subject: Die sonbrandroom
• Verb: is
• Rest of the sentence: in die rugsak

So it follows the same basic pattern as English:

• The sunscreen is in the backpack

Afrikaans is often very similar to English in simple main clauses.

Yes, you can. Afrikaans allows fronting for emphasis. If you begin with In die rugsak, the verb still stays in second position:

• In die rugsak is die sonbrandroom.

This version puts more focus on where it is. But the original sentence,

• Die sonbrandroom is in die rugsak,

is the most neutral and straightforward way to say it.

Because Afrikaans is simpler than many European languages in this area. The definite article is just die for essentially all nouns, whether singular or plural.

For example:

• die rugsak = the backpack
• die rugsakke = the backpacks

So learners do not need to memorize masculine, feminine, or neuter article forms.

Here, in means in or inside. In this sentence, it shows location:

• is in die rugsak = is in the backpack

This is the most natural preposition here. You could sometimes use more explicit wording in other contexts, but in die rugsak is the standard, idiomatic choice.

A simple English-friendly guide would be:

• sonbrandroom ≈ son-brunt-room
• rugsak ≈ rukh-sack or rug-sack

A few notes:

• son sounds close to English son
• brand has an a more like the u in British cup for many learners, not like the a in English brand
• room sounds like English room
• g in rug is a harsher Afrikaans sound, made in the throat, not a soft English g

The exact pronunciation depends a little on accent, but those approximations are a useful start.

Because Afrikaans does not capitalize all nouns. Unlike German, common nouns stay lowercase unless they begin a sentence.

So:

• Die sonbrandroom is in die rugsak.

Here, Die is capitalized only because it starts the sentence, not because it is a noun.

Is is the present-tense form of the verb wees (to be). It works just like English is here:

• Die sonbrandroom is in die rugsak.
• The sunscreen is in the backpack.

So is connects the subject to its location.

You would use the indefinite article ’n instead of die:

• Die sonbrandroom is in ’n rugsak.

That means The sunscreen is in a backpack.

A useful point: ’n is written with an apostrophe and is not capitalized, even at the beginning of a sentence in normal writing. The following word is capitalized instead.

It is neutral and natural. It works in both everyday speech and normal writing. There is nothing especially formal or especially casual about it.

It is just a simple, standard Afrikaans sentence describing location.