Alla medarbetare är välkomna.

Alla means all or everyone when talking about more than one person or thing.

In this sentence, alla medarbetare means all employees / all co-workers, so Swedish uses alla.

Compare:

• all mat = all food
• allt vatten = all the water
• alla medarbetare = all employees

So alla is the form used with plural nouns.

Here it is plural.

A useful thing to know is that medarbetare has the same form in singular and plural indefinite:

• en medarbetare = an employee / a co-worker
• flera medarbetare = several employees / co-workers

So the word itself does not change here. You know it is plural because of alla and because välkomna is plural.

Medarbetare literally means something like co-worker, colleague, or employee, depending on context.

It is a fairly common workplace word in Swedish and often sounds a bit more neutral or inclusive than anställd.

Roughly:

• medarbetare = employee / staff member / co-worker
• anställd = employee more specifically

In many contexts, both could work, but medarbetare is very common in company communication.

Är is the present tense of vara = to be.

So the structure is:

• Alla medarbetare = subject
• är = are
• välkomna = welcome

Just like in English, you need the verb to be here:

• All employees are welcome

You cannot normally leave out är in a full Swedish sentence like this.

Because the subject is plural.

Swedish adjectives change form depending on what they describe. When an adjective describes a plural noun, it usually takes -a.

So:

• en medarbetare är välkommen = one employee is welcome
• alla medarbetare är välkomna = all employees are welcome

Here, välkomna agrees with the plural noun medarbetare.

In this sentence, välkomna is functioning as an adjective.

It describes the subject:

• medarbetare → välkomna

So the sentence literally works like:

• All employees are welcome

You will also see välkommen, välkommen!, and välkomna! used as greetings:

• Välkommen! = said to one person
• Välkomna! = said to several people

So the word can appear both in greetings and in normal descriptive sentences.

Because alla already works as a determiner here.

In English, we say all employees, not usually all the employees unless we mean a specific group. Swedish works similarly:

• alla medarbetare = all employees
• alla medarbetarna = all the employees

So the sentence without the definite ending is more general. It can mean that employees as a group are welcome.

Yes, you could, but the meaning is slightly different.

• Alla medarbetare är välkomna = All employees are welcome
  More general.
• Alla medarbetarna är välkomna = All the employees are welcome
  Refers more clearly to a specific group of employees.

Both are grammatical. The version without the definite ending is very natural in signs, invitations, and general statements.

The normal word order is:

Subject + verb + complement

So:

• Alla medarbetare = subject
• är = verb
• välkomna = complement

This is the standard Swedish pattern for a simple statement.

Swedish also has the V2 rule, which means the finite verb usually comes in second position in main clauses. Since the subject comes first here, the verb naturally follows it.

A simple approximate pronunciation is:

AH-lah meh-DAR-beh-tah-reh air VEL-kom-nah

A few notes:

• alla sounds roughly like AH-lah
• är is pronounced a bit like air, though not exactly the same as English
• välkomna begins with v, not an English w
• Swedish rhythm is usually smoother and less stressed on every word than English learners sometimes expect

If you want to sound natural, make sure är is not over-pronounced. In normal speech it can sound quite light.

Usually alla is used with plural countable nouns:

• alla barn = all children
• alla medarbetare = all employees

But Swedish uses other forms with singular mass nouns or neuter singular nouns:

• all tid = all time
• allt vatten = all the water
• allt är klart = everything is ready

So in this sentence, alla is correct because medarbetare refers to multiple people.

It is neutral and natural, and it can fit both formal and informal contexts.

For example, it works well in:

• workplace communication
• event invitations
• signs or announcements
• emails

It sounds polite and standard, not overly formal. That makes it a very useful sentence pattern to learn.