Om du fuskar vill jag inte spela.

Om means if when introducing a condition.

So Om du fuskar ... means If you cheat ...

In Swedish, om is the normal word for if in this kind of conditional sentence:

• Om det regnar, stannar jag hemma. = If it rains, I stay home.
• Om du kommer, blir jag glad. = If you come, I’ll be happy.

Fuskar is the present tense of the verb fuska, which means to cheat.

Swedish present tense verbs often end in -r:

• fuska = to cheat
• fuskar = cheat / are cheating

So du fuskar means you cheat or you are cheating, depending on context.

Because Swedish needs a finite verb in the clause, and here that verb is in the present tense.

• du fuskar = you cheat / you are cheating
• fuska by itself is the infinitive = to cheat

So after the subject du, you need the conjugated form fuskar.

This is because Swedish follows the V2 rule in main clauses. V2 means the finite verb must come in the second position.

The sentence begins with the subordinate clause:

• Om du fuskar

After that, the main clause starts. Because something has already been placed first, the finite verb in the main clause comes next:

• vill jag inte spela

So:

• Om du fuskar, vill jag inte spela.

If the main clause stood alone, it would be:

• Jag vill inte spela.

This is a very common pattern in Swedish:

• Om du kommer, går jag.
• I dag vill jag vila.
• Sen ska vi äta.

The finite verbs are:

• fuskar in the subordinate clause
• vill in the main clause

A finite verb is the verb that shows tense and agrees with the clause structure.

In vill jag inte spela, the finite verb is vill, so under the V2 rule it must come before the subject jag.

In the main clause, inte usually comes after the finite verb and often before the infinitive or main verb.

Here:

• vill = finite verb
• jag = subject
• inte = not
• spela = infinitive

So:

• vill jag inte spela

This is normal Swedish word order.

Compare:

• Jag spelar inte. = I am not playing.
• Jag vill inte spela. = I do not want to play.

Because after vill, Swedish uses the infinitive form of the next verb.

• vill spela = want to play
• vill gå = want to go
• vill äta = want to eat

So:

• Jag vill spela.
• not Jag vill spelar.

This is similar to English want to play, except Swedish does not use a separate word for to here.

No. After vill, you normally do not use att.

So it is:

• Jag vill spela.
• not Jag vill att spela.

Many Swedish modal verbs work this way:

• kan spela = can play
• ska spela = will / shall play
• måste spela = must play
• vill spela = want to play

Yes. That is also correct.

Both mean the same thing:

• Om du fuskar vill jag inte spela.
• Jag vill inte spela om du fuskar.

The difference is mainly focus and style:

• Starting with Om du fuskar puts the condition first.
• Starting with Jag vill inte spela puts the speaker’s reaction first.

Note that when the sentence starts with the om-clause, the main clause changes word order because of V2:

• Om du fuskar, vill jag inte spela. But if the main clause comes first, normal order is used:
• Jag vill inte spela om du fuskar.

In modern Swedish, the comma is often optional in short sentences like this.

So you may see:

• Om du fuskar vill jag inte spela.
• Om du fuskar, vill jag inte spela.

Both are acceptable in many contexts. A comma can make the sentence a little easier to read, but it is not always required.

Yes, in this context spela most naturally means play in the sense of playing a game.

Since the sentence includes fuskar (cheat), it strongly suggests a game or activity with rules.

Spela can also be used for:

• playing an instrument
• acting/performing
• gambling

But here the meaning is clearly play as in taking part in a game.

Yes. Fuska can mean cheat, but also more generally cut corners, do something dishonestly, or break rules.

For example:

• Han fuskar på provet. = He is cheating on the test.
• De fuskar med skatten. = They cheat on taxes.
• Hon fuskar med dieten. = She cheats on the diet.

In your sentence, though, the most natural meaning is ordinary cheating in a game.

It sounds completely natural.

A speaker might say it with stress on the important parts:

• Om du fuskar vill jag inte spela.

Depending on tone, it could sound like:

• a warning
• a boundary
• mild annoyance
• serious refusal

If you want to sound a little softer, you could also say:

• Om du fuskar så vill jag inte spela.

The little word så is often added in speech after an om-clause, though it is not necessary.