Vi har brug for en anden løsning, hvis planen går galt.

In Danish, the fixed expression is at have brug for = to need / to have need of.

So:

• Vi har brug for en anden løsning = We need another solution

You normally cannot stop at har brug in this meaning. The for is part of the expression.

A few examples:

• Jeg har brug for hjælp. = I need help.
• Har du brug for en pause? = Do you need a break?

Because løsning is a common gender noun, so it takes en in the indefinite singular.

• en løsning = a solution
• løsningen = the solution

The word anden means other / another, and it changes form to match the noun:

• en anden løsning = another solution
• et andet problem = another problem
• andre løsninger = other solutions

So here en anden løsning is the correct form because løsning is an en-word.

These are different forms of the same word, chosen according to gender and number.

• anden → used with en-words in singular
• andet → used with et-words in singular
• andre → used with plural nouns

Examples:

• en anden løsning = another solution
• et andet forslag = another suggestion
• andre planer = other plans

Since løsning is singular and an en-word, anden is correct.

Planen is the definite singular form of plan:

• en plan = a plan
• planen = the plan

In Danish, definiteness is often shown by adding an ending to the noun, unlike English, which uses a separate word (the).

So:

• hvis planen går galt = if the plan goes wrong

You can sometimes use den plan, but that usually happens when there is an adjective or special emphasis:

• den nye plan = the new plan
• den plan = that plan / that particular plan

In your sentence, simple planen is the natural form.

Hvis means if and introduces a conditional clause.

So the sentence has two parts:

• Vi har brug for en anden løsning = main clause
• hvis planen går galt = if the plan goes wrong

This is very common in Danish:

• Hvis det regner, bliver vi hjemme. = If it rains, we stay home.
• Jeg ringer, hvis jeg bliver forsinket. = I’ll call if I get delayed.

Because this is a subordinate clause introduced by hvis.

In Danish subordinate clauses, the subject usually comes before the verb in a normal order:

• hvis planen går galt
• hvis vi har tid
• hvis han kommer

This is different from main clause word order, where Danish often puts the finite verb in second position.

Compare:

• Planen går galt. = The plan goes wrong.
• Hvis planen går galt, ... = If the plan goes wrong, ...

So the word order here is completely normal for a hvis clause.

Literally, går galt means something like goes wrong.

• at gå = to go
• galt = wrong, badly, incorrectly

Together, gå galt is a very common expression meaning:

• to go wrong
• to fail
• to turn out badly

Examples:

• Noget gik galt. = Something went wrong.
• Hvis det går galt, prøver vi igen. = If it goes wrong, we’ll try again.

So planen går galt is best understood as the plan goes wrong or the plan fails.

Because gå galt is the idiomatic expression for go wrong.

There is a difference:

• Det er galt. = It is wrong / something is wrong.
• Det går galt. = It goes wrong / it is going wrong.

So:

• er galt describes a state
• går galt describes something happening or turning out badly

In your sentence, the idea is that the plan might fail or go badly, so går galt is the right choice.

Danish uses commas before many subordinate clauses, including clauses introduced by hvis.

So:

• Vi har brug for en anden løsning, hvis planen går galt.

That comma is standard Danish punctuation.

English punctuation is sometimes more flexible in similar sentences, but in Danish the comma is much more systematic.

Yes. You can move the if-clause to the front:

• Hvis planen går galt, har vi brug for en anden løsning.

Notice what happens in the main clause after the fronted clause:

• har vi instead of vi har

This happens because Danish main clauses follow the verb-second pattern. When the subordinate clause comes first, the finite verb of the main clause comes before the subject.

Compare:

• Vi har brug for en anden løsning, hvis planen går galt.
• Hvis planen går galt, har vi brug for en anden løsning.

Both are correct.

It usually works the same way in meaning, but grammatically it is built differently.

English:

• We need another solution.

Danish:

• Vi har brug for en anden løsning.
• literally: We have need for another solution.

Danish also has the verb at behøve (to need), but have brug for is extremely common and often sounds very natural in everyday language.

For example:

• Jeg behøver hjælp. = I need help.
• Jeg har brug for hjælp. = I need help.

Both can work, but har brug for is often the more common everyday phrasing.

These parts can be tricky for English speakers.

A rough guide:

• brug for: the g in brug is not pronounced like English g in go. Danish pronunciation is softer and less direct than English spelling suggests.
• går has the Danish å sound, somewhat like the vowel in British English law, but not exactly.
• galt has a broad a sound, and the t is clearly pronounced.

Very rough approximations:

• brug for ≈ broo' for
• går galt ≈ gor gelt

But these are only rough hints. Danish pronunciation varies a lot from the spelling, so it’s best to listen to native audio if possible.

It can be both.

Løsning means solution, and it can refer to:

• a practical fix
• an answer to a problem
• a strategy
• a way out of a situation

Examples:

• Vi fandt en løsning på problemet. = We found a solution to the problem.
• Det er ikke den bedste løsning. = It’s not the best solution.

So in your sentence, en anden løsning could be a backup plan, a different strategy, or another way of handling the situation.