Min beställning blev billigare eftersom jag hittade en rabattkod i går kväll.

Because beställning is an en-word in Swedish: en beställning.

Possessive words change depending on the noun:

• min
  • en-word
• mitt
  • ett-word
• mina
  • plural

So:

• min beställning = my order
• mitt hus = my house
• mina böcker = my books

Also, Swedish normally does not use an article after a possessive, so you say min beställning, not min en beställning.

Beställning means order, usually in the sense of something you order from a shop, website, restaurant, etc.

It comes from the verb beställa, which means to order.

Examples:

• Jag beställde maten. = I ordered the food.
• Min beställning kom i dag. = My order arrived today.

So in this sentence, min beställning is most naturally my order.

Blev is the past tense of bli, which means become.

So blev billigare literally means became cheaper.

That fits the idea that the price changed:

• first the order had one price
• then it became cheaper after the discount code was found

This is slightly different from var billigare (was cheaper), which would describe a state rather than a change.

Compare:

• Det blev billigare. = It got cheaper / It became cheaper.
• Det var billigare. = It was cheaper.

Because billigare is the comparative form of billig.

• billig = cheap
• billigare = cheaper
• billigast = cheapest

Since the sentence is talking about a change in price, Swedish uses the comparative:

• Min beställning blev billigare = My order became cheaper

This works much like English cheap → cheaper.

Because the sentence does not explicitly say cheaper than something.

It just says the order became cheaper, without naming the comparison point. The comparison is understood: cheaper than it was before.

If you wanted to say cheaper than before, you could say:

• Min beställning blev billigare än tidigare.

Here än means than.

Eftersom means because/since and introduces a reason:

• Min beställning blev billigare eftersom jag hittade en rabattkod.

Yes, you can often also use för att for because:

• Min beställning blev billigare för att jag hittade en rabattkod.

But learners should know this:

• eftersom is very clearly a conjunction meaning because
• för att can also mean in order to, so sometimes it is less straightforward

In this sentence, eftersom is a very natural and clear choice.

Because after eftersom, Swedish uses normal subordinate clause word order.

That means:

• conjunction + subject + verb

So:

• eftersom jag hittade en rabattkod
• not eftersom hittade jag en rabattkod

This is an important Swedish pattern. In subordinate clauses, the subject normally comes before the finite verb.

Compare:

• Main clause: Jag hittade en rabattkod.
• Subordinate clause: ... eftersom jag hittade en rabattkod.

Because Swedish very often forms compound nouns by writing them as one word.

So:

• rabatt = discount
• kod = code
• rabattkod = discount code

This is extremely common in Swedish. English often writes these as two words, but Swedish usually joins them.

Other examples:

• bokhandel = bookshop
• sommarkväll = summer evening
• mobiltelefon = mobile phone

So rabattkod is exactly what you would expect in Swedish spelling.

Because rabattkod is an en-word: en rabattkod.

So in the sentence:

• jag hittade en rabattkod = I found a discount code

If it were an ett-word, it would be ett instead. But the correct form is:

• en rabattkod

Hittade is the past tense of hitta, which means find.

• hitta = to find
• hittar = find / am finding
• hittade = found
• hittat = found (supine/past participle context depending on structure)

So:

• jag hittade en rabattkod = I found a discount code

The sentence is talking about something that happened in the past, so hittade is the correct form.

I går kväll means yesterday evening or last night, depending on context.

Breakdown:

• i går = yesterday
• kväll = evening

Together:

• i går kväll = yesterday evening

English often says last night, but Swedish is being more specific here with yesterday evening.

You may also see igår kväll written as one word in less careful writing, but i går kväll is the standard form.

In this sentence it comes at the end:

• ... eftersom jag hittade en rabattkod i går kväll.

That is a very normal position for a time expression in Swedish.

You can also move it for emphasis:

• I går kväll hittade jag en rabattkod.

When a time expression comes first in a main clause, Swedish usually uses inversion:

• I går kväll hittade jag ...
• not I går kväll jag hittade ...

But after eftersom, the sentence keeps subordinate clause word order if the time expression is not fronted.

Sometimes, yes, especially in modern informal Swedish influenced by English, but beställning is the more standard Swedish word.

• beställning = standard/native Swedish word for order
• order does exist in Swedish too, but it can sound more business-like, technical, or domain-specific depending on context

For a learner, min beställning is a very safe and natural choice.

In billigare, the g is pronounced as a hard g.

A rough guide:

• billig sounds approximately like BIL-lee
• billigare sounds approximately like BIL-lee-gah-reh

The g is heard more clearly in the longer form billigare than many learners expect.

So do not pronounce it like English j here.

Yes. You can say:

• Eftersom jag hittade en rabattkod i går kväll blev min beställning billigare.

That is fully correct.

Notice what happens in the main clause after the subordinate clause comes first:

• ... blev min beställning billigare
• not ... min beställning blev billigare

This is because Swedish follows the V2 rule in main clauses: the finite verb comes in second position.

So both are correct:

• Min beställning blev billigare eftersom jag hittade en rabattkod i går kväll.
• Eftersom jag hittade en rabattkod i går kväll blev min beställning billigare.

Because Swedish usually forms the comparative directly on the adjective, just like English often does.

So:

• billig → billigare
• not something like mer billig in normal usage

Using mer billig would sound unnatural here. Swedish strongly prefers billigare.

So the natural phrase is:

• blev billigare = became cheaper

Yes, it sounds natural and idiomatic.

A native speaker would easily say or write this, especially when talking about online shopping or a purchase:

• Min beställning blev billigare eftersom jag hittade en rabattkod i går kväll.

It is clear, grammatically normal, and very everyday in style.