To ciekawostka.

In To ciekawostka, to is doing the job of this/that/it is in a very general identifying sentence.

It often appears in Polish when you point something out or label it:

• To problem. = That is a problem.
• To mój brat. = This is my brother.
• To ciekawostka. = That’s an interesting fact / a curiosity.

So to is not just a simple word-for-word this here; it helps form an identification: this/that is X.

Polish often allows jest to be omitted in short present-tense identification sentences, especially with to.

So both are possible:

• To ciekawostka.
• To jest ciekawostka.

The version without jest sounds shorter and more compact. The version with jest is a little more explicit. Both are natural.

Here ciekawostka is in the nominative singular.

That is because in this kind of to + noun identification pattern, the noun is normally in the nominative:

• To dom.
• To książka.
• To ciekawostka.

This can be confusing because learners also meet sentences like On jest lekarzem, where lekarzem is instrumental. But with to in identification sentences, nominative is very common.

It is a noun.

Ciekawostka means something like an interesting fact, a curiosity, or a little curiosity. It comes from the same family as ciekawy (interesting) and ciekawość (curiosity), but here it is definitely a noun.

So:

• ciekawy = interesting
• ciekawość = curiosity
• ciekawostka = interesting fact / curiosity / fun fact

Yes. In many simple sentences, to can be translated as this, that, or sometimes it, depending on context.

For example:

• If you are pointing at something near you, English might use this.
• If you are reacting to something just mentioned, English might use that.
• In some contexts, English might naturally say it.

So the exact English choice depends on the situation, even though Polish still uses to.

Not exactly.

To ciekawostka means more literally That is an interesting fact / a curiosity / a fun fact. It labels something as a noteworthy piece of information.

If you want That’s interesting, Polish would more naturally say:

• To ciekawe.
• To interesujące.

So ciekawostka is a noun, while ciekawe is an adjective used in a different structure.

Because Polish does not have articles like a, an, or the.

So ciekawostka can mean:

• a curiosity
• an interesting fact
• sometimes the interesting fact

The exact meaning depends on context. English needs an article, but Polish does not.

A rough English approximation is:

to chye-ka-VOST-ka

A few useful points:

• to sounds like Polish to, with a short o
• cie is a soft sound, roughly like chye to an English speaker
• the stress in ciekawostka falls on the second-to-last syllable: cie-ka-VOST-ka

Polish stress is very often on the penultimate syllable, and this word follows that pattern.

Yes, it can be natural, especially as a short comment or reaction.

For example, after hearing an unusual fact, someone might say:

• To ciekawostka.

It can sound slightly compact or punchy. In fuller, more neutral speech, you may also hear:

• To jest ciekawostka.

So the shorter version is fine; it is just a bit more concise.

The most normal order here is To ciekawostka.

Polish word order is flexible, but not every rearrangement sounds equally natural in every context. Putting to first is the standard way to make this kind of identifying statement.

A changed order like Ciekawostka to... is possible only in a different structure, usually when more words follow, for example:

• Ciekawostka to rzecz warta zapamiętania.

But for the simple sentence here, To ciekawostka is the normal form.