Dok čekamo u redu, razgovaramo o svom planu za sutra.

Dok means while in this sentence.

It introduces a clause that describes something happening at the same time as the main action:

• Dok čekamo u redu = While we are waiting in line
• razgovaramo o svom planu za sutra = we are talking about our plan for tomorrow

So dok connects two simultaneous actions.

Serbian often uses the present tense for actions happening right now or for actions that are generally ongoing.

Here:

• čekamo = we wait / we are waiting
• razgovaramo = we talk / we are talking

In English, you usually need are waiting and are talking for an action in progress. In Serbian, the simple present can cover that meaning.

Because the verb ending already shows the subject.

• čekamo ends in -mo, which tells you the subject is we
• razgovaramo also ends in -mo, again meaning we

So Serbian often drops subject pronouns like mi (we) unless they are needed for emphasis or contrast.

Compare:

• Čekamo. = We are waiting.
• Mi čekamo. = We are waiting. (with extra emphasis on we)

Here u redu means in line or in a queue.

• red = line, row, order
• u redu = in the line / in the queue

This is a very common expression.

Be careful: u redu can also mean okay / all right in other contexts.

For example:

• Sve je u redu. = Everything is okay.
• Čekamo u redu. = We are waiting in line.

So the meaning depends on context.

Because the preposition o normally requires the locative case when it means about.

So:

• basic form: svoj plan = one’s own plan
• after o: o svom planu = about one’s own plan

The noun changes:

• plan → planu

And the adjective changes too, to match the noun in case, gender, and number:

• svoj → svom

Svoj is the reflexive possessive, meaning one’s own.

In this sentence, the subject is we, and the plan belongs to that same subject. Because of that, Serbian prefers svoj:

• razgovaramo o svom planu = we are talking about our own plan

This is more natural than našem planu in many contexts.

A useful rule:

• Use svoj when the possessor is the same as the subject.
• Use naš, moj, tvoj, etc. when you want a non-reflexive possessive or special emphasis.

So:

• Mi razgovaramo o svom planu. = We are talking about our own plan.
• Mi razgovaramo o našem planu. = We are talking about our plan.
  This is possible, but svom is often the more idiomatic choice when the subject and possessor are the same.

Za here means something like for in the sense of intended for a future time.

So:

• plan za sutra = plan for tomorrow

This is a very common structure in Serbian:

• rezervacija za večeras = reservation for tonight
• sastanak za ponedeljak = meeting for Monday
• plan za sutra = plan for tomorrow

Also, sutra is one of those time words that does not change form here, so it stays sutra.

The word order is very natural and neutral.

• Dok čekamo u redu = subordinate time clause first
• razgovaramo o svom planu za sutra = main clause second

This order is similar to English: While we wait in line, we talk about our plan for tomorrow.

You could change the order and still keep the meaning:

• Razgovaramo o svom planu za sutra dok čekamo u redu.

That also works, but the original version sounds smooth and common.

Because Dok čekamo u redu is a subordinate clause placed before the main clause.

So Serbian uses a comma:

• Dok čekamo u redu, razgovaramo o svom planu za sutra.

This is similar to English, where a clause beginning with while also often takes a comma when it comes first.

Both are 1st person plural present tense forms of imperfective verbs.

• čekamo ← čekati = to wait
• razgovaramo ← razgovarati = to talk, converse

Why imperfective? Because the sentence describes ongoing, uncompleted actions happening at the same time.

That is why these verbs fit well with dok (while).

Yes, that is a good literal translation, and it is grammatically close to the Serbian structure.

But in natural English, you might also say:

• While we’re waiting in line, we’re talking about our plan for tomorrow.
• While we wait in line, we talk about our plan for tomorrow.

The Serbian sentence itself does not force a big distinction between wait and are waiting the way English does. Context decides whether it feels more general or more immediate.