Jakmile najdeme stopu, rozluštíme kód.

Jakmile means as soon as.

It introduces a time clause: one thing happens immediately after another.

So in:

Jakmile najdeme stopu, rozluštíme kód.

the structure is:

• Jakmile najdeme stopu = As soon as we find a clue
• rozluštíme kód = we will decipher the code

A very common pattern in Czech is:

• Jakmile + clause, main clause
• Main clause + jakmile + clause

For example:

• Jakmile přijde, začneme. = As soon as he arrives, we’ll start.
• Začneme, jakmile přijde. = We’ll start as soon as he arrives.

This is one of the most important things to notice.

Both najdeme and rozluštíme are present forms of perfective verbs, but in Czech, perfective present forms usually refer to the future.

So:

• najdeme literally looks like present, but means we will find
• rozluštíme literally looks like present, but means we will decipher

This is very normal in Czech.

Compare:

• najít = perfective = to find
• nacházet / hledat = imperfective = to be finding / to look for

A perfective verb focuses on a completed result, so its “present” form typically points to a future completed action.

That is why Czech does not use an extra word like budeme here.

Because Czech often does not need a separate future marker with perfective verbs.

In English, you say:

• we will find
• we will decipher

In Czech, with perfective verbs, the future is built simply by using the present-form conjugation:

• najdeme = we will find
• rozluštíme = we will decipher

By contrast, with imperfective verbs, Czech usually forms the future with být:

• budeme hledat = we will be looking for
• budeme luštit = we will be deciphering / solving

So this sentence uses perfective verbs because it is about reaching results:

• finding the clue
• cracking the code

Najdeme is the 1st person plural form of the verb najít (to find, perfective).

So:

• já najdu = I will find
• ty najdeš = you will find
• on/ona najde = he/she will find
• my najdeme = we will find
• vy najdete = you will find
• oni najdou = they will find

The ending -me tells you it means we.

Rozluštíme is the 1st person plural form of rozluštit (to decipher / crack / solve, perfective).

So:

• já rozluštím = I will decipher
• ty rozluštíš = you will decipher
• on/ona rozluští = he/she will decipher
• my rozluštíme = we will decipher
• vy rozluštíte = you will decipher
• oni rozluští = they will decipher

Again, the ending shows we.

The long í is part of the conjugation pattern and should be pronounced long.

Because stopu is the accusative singular of stopa.

The verb najít needs a direct object: you find something.
That direct object goes into the accusative case.

• nominative: stopa = a clue / a trace
• accusative: stopu = a clue / a trace

So:

• stopa je důležitá = the clue is important
  here stopa is the subject
• najdeme stopu = we will find a clue
  here stopu is the object

This is a very common feminine noun pattern:

• žena → ženu
• kniha → knihu
• stopa → stopu

Because kód is a masculine inanimate noun, and in the singular its nominative and accusative are the same.

So:

• nominative: kód
• accusative: kód

That means:

• Kód je složitý. = The code is complicated.
• Rozluštíme kód. = We will decipher the code.

The form stays the same, even though the grammatical role changes.

Because jakmile najdeme stopu is a subordinate clause, and Czech separates subordinate clauses with a comma.

So the sentence is:

• Jakmile najdeme stopu, rozluštíme kód.

This is similar to written English, where you also normally use a comma when an as soon as clause comes first:

• As soon as we find a clue, we’ll decipher the code.

If the order is reversed, Czech still uses the comma:

• Rozluštíme kód, jakmile najdeme stopu.

Yes. Czech word order is fairly flexible.

You can also say:

• Rozluštíme kód, jakmile najdeme stopu.

This means the same thing: We’ll decipher the code as soon as we find a clue.

The original version puts the time condition first:

• Jakmile najdeme stopu, rozluštíme kód.

That feels natural if you want to emphasize the moment we find the clue.

The reversed version starts with the main result:

• Rozluštíme kód, jakmile najdeme stopu.

That puts slightly more focus on deciphering the code.

So the difference is mostly about focus and style, not basic meaning.

This is an aspect question.

• najdeme = we will find
  focuses on the successful result
• budeme hledat = we will look for / we will be searching for
  focuses on the process

So these are not the same:

• Jakmile najdeme stopu... = As soon as we find a clue...
• Jakmile budeme hledat stopu... would mean something like As soon as we are looking for a clue..., which is a different idea and sounds odd in this context

Similarly:

• rozluštíme kód = we will crack the code
  result
• budeme luštit kód = we will be working on deciphering the code
  process

Czech uses aspect very strongly, so choosing the right verb matters a lot.

Not exactly in all contexts, but it works well here.

Stopa literally means trace, track, footprint, or sign left behind.
Depending on context, it can also mean clue.

So in a detective or puzzle context:

• najít stopu can mean to find a clue

It often suggests a piece of evidence or something that leads you further.

A rough pronunciation guide:

• Jakmile ≈ YAK-mi-leh
• najdeme ≈ NAI-deh-meh
• stopu ≈ STO-poo
• rozluštíme ≈ ROZ-loosh-tee-meh
• kód ≈ koht with a long ó

A few useful notes:

• Czech stress is usually on the first syllable of each word.
• š sounds like sh
• ž sounds like the s in measure
• luš in rozluštíme sounds like loosh
• í and ó are long vowels, so hold them a bit longer

Yes, that is a very natural translation.

Depending on context, jakmile can be rendered as:

• as soon as
• once

So both of these are good:

• As soon as we find a clue, we’ll decipher the code.
• Once we find a clue, we’ll crack the code.

The exact English choice depends on style:

• as soon as emphasizes immediacy
• once can sound slightly smoother or more conversational

Also, rozluštit kód can be translated as:

• decipher the code
• crack the code
• solve the code

with crack the code often sounding the most natural in everyday English.