Splatnost je zítra, stále však čekám na kopii.

Splatnost means due date, deadline for payment, or date when something becomes payable. It is most commonly used in financial, billing, and administrative contexts.

So in this sentence, Splatnost je zítra means something like The payment is due tomorrow or The due date is tomorrow.

It is a fairly formal noun. In everyday speech, people might sometimes rephrase the idea depending on context, but splatnost is completely normal in invoices, banking, contracts, and official communication.

Czech often uses být (to be) in simple statements of time, date, identity, or status.

So:

• Splatnost je zítra = The due date is tomorrow

This is very natural Czech. The structure is basically:

• splatnost = subject
• je = is
• zítra = tomorrow

You do not need a verb meaning to have here. Czech is just stating what the due date is.

Because zítra by itself already means tomorrow. Czech often uses time adverbs directly, without a preposition.

For example:

• dnes = today
• zítra = tomorrow
• včera = yesterday

So:

• Splatnost je zítra = The due date is tomorrow

You do not say something like in tomorrow. English also works similarly here.

Together, stále však means something like still, however or nevertheless, I am still...

The two words contribute slightly different things:

• stále = still
• však = however / nevertheless / but

So the sentence is not just saying I am still waiting for a copy, but also setting up a contrast:

• the due date is tomorrow,
• however, I am still waiting for the copy.

This combination sounds natural and adds emphasis to the contrast.

That is very typical in Czech. The word však often appears in the second position of a clause, or near the beginning, rather than as the very first word.

So:

• stále však čekám na kopii

is a natural Czech word order.

A very literal breakdown is:

• stále = still
• však = however
• čekám = I am waiting
• na kopii = for the copy

English usually prefers however at the beginning or after a comma, but Czech allows však in this more internal position very naturally.

Yes, you often could. For example:

• Splatnost je zítra, ale stále čekám na kopii.

This also means The due date is tomorrow, but I am still waiting for a copy.

The difference is mainly stylistic:

• ale = the most common everyday but
• však = a bit more formal, written, or nuanced; often like however / nevertheless

So in this sentence, však sounds a little more polished or formal than ale.

Because the verb čekat normally takes na + accusative when it means to wait for someone or something.

So:

• čekám na kopii = I am waiting for a copy

This is just the standard Czech pattern:

• čekat na něco / někoho = to wait for something / someone

Examples:

• Čekám na autobus. = I’m waiting for the bus.
• Čekáme na odpověď. = We’re waiting for a reply.

Because after na with čekat na, the noun must be in the accusative case.

The base form is:

• kopie = copy (dictionary form, nominative singular)

But here Czech needs the accusative singular:

• kopii

So:

• na kopii = for a copy

This is a good example of case changing the ending of a noun.

Because Czech usually does not need subject pronouns when the verb already shows the person clearly.

• čekám means I am waiting
• the ending -ám already tells you it is I

So já čekám is possible, but it adds emphasis, contrast, or emotion. In a neutral sentence, Czech normally just says:

• čekám

This is very common in Czech and other Slavic languages.

Yes, the comma is natural and correct here because the sentence contains two coordinated clauses:

• Splatnost je zítra
• stále však čekám na kopii

These are two separate statements joined into one sentence, with a contrast between them. Czech punctuation normally separates such clauses with a comma.

So the comma helps show the pause and the relationship:

• the due date is tomorrow,
• yet I am still waiting for the copy.

It can mean either, depending on context, because Czech has no articles like a and the.

So na kopii could be:

• for a copy
• for the copy

You understand which one is meant from the situation. If both speaker and listener already know which copy is being discussed, English would probably use the copy. If it is more indefinite, English might use a copy.

That is a very common challenge for English speakers learning Czech: Czech simply leaves this distinction to context.