To jest miła niespodzianka.

Here to is a pronoun meaning something like this, that, or sometimes it, depending on context.

In To jest miła niespodzianka, it is used to identify or point to something:

• To jest... = This/That is...
• In natural English, this sentence is often rendered as This is a nice surprise or That’s a nice surprise

So to does not refer to a specific grammatical gender here. It is a very common neutral pointing word in Polish.

Jest means is.

It is the 3rd person singular present tense form of the verb być, which means to be.

So:

• to = this/that/it
• jest = is

Together, to jest means this is or that is.

Because miła has to agree with niespodzianka.

In Polish, adjectives change their form to match the noun in:

• gender
• number
• case

Since niespodzianka is feminine singular nominative, the adjective must also be feminine singular nominative:

• miły = masculine
• miła = feminine
• miłe = neuter

So:

• miły prezent = a nice present
• miła niespodzianka = a nice surprise
• miłe dziecko = a nice child

A very common clue in Polish is the ending -a.

Most nouns ending in -a are feminine, and niespodzianka is one of them.

Because it is feminine, other words connected to it also take feminine forms, such as:

• miła niespodzianka
• ta niespodzianka
• moja niespodzianka

There are some exceptions in Polish, especially words for male people like mężczyzna or kolega, but niespodzianka is a normal feminine noun.

Because after to jest in a sentence like this, Polish normally uses the nominative form.

So you get:

• To jest miła niespodzianka.

Here miła niespodzianka is the thing being identified, so it stays in the nominative.

English speakers often wonder about niespodzianką, because Polish sometimes uses the instrumental after forms of to be in other sentence types. For example:

• Ona jest miłą osobą. = She is a nice person.

But with the identifying pattern To jest..., nominative is the normal choice:

• To jest problem.
• To jest moja siostra.
• To jest miła niespodzianka.

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

So Polish simply says:

• To jest miła niespodzianka.

and context tells you whether English should use:

• a nice surprise
• the nice surprise
• sometimes just nice surprise in a looser translation

In this sentence, English most naturally uses a: This is a nice surprise.

No. They are related, but they do different jobs.

• to can stand alone as a pronoun: this / that / it
• ta is a feminine form of the demonstrative adjective meaning this

Compare:

• To jest miła niespodzianka. = This/That is a nice surprise.
• Ta niespodzianka jest miła. = This surprise is nice.

In the second sentence, ta directly modifies the noun niespodzianka, so it has to match it in gender.

The word order here is the most neutral and natural one:

• To jest miła niespodzianka.

A few useful points:

• miła niespodzianka is the normal order, because adjectives usually come before the noun in Polish
• changing the order can sound marked, poetic, or unnatural
• To miła niespodzianka is also possible, especially in speech, as a shorter or more emotional version

So for a learner, To jest miła niespodzianka is the safest standard form.

Yes, you sometimes can.

To miła niespodzianka is a natural shortened version, especially in speech, when reacting to something.

Compare:

• To jest miła niespodzianka. = full, neutral, standard
• To miła niespodzianka. = slightly shorter, often more conversational or expressive

As a learner, it is best to learn the full version first, and then notice that Polish often drops words in everyday speech when the meaning is still clear.

Miła is pronounced roughly like MEE-wa.

Important detail:

• the Polish letter ł is pronounced like English w

So:

• mi sounds like mee
• ła sounds like wa

That gives MEE-wa.

A rough English-style approximation is:

nye-spo-JAHN-ka

A few helpful details:

• nie sounds roughly like nye
• dzia has a soft sound, somewhat like a softened English j
• the stress is on the second-to-last syllable, so: niespoDZIANka

You do not need to make it perfect right away. The most useful beginner approximation is:

nye-spo-JAHN-ka

No. Miły / miła / miłe has a wider range of meanings, depending on context.

It can mean things like:

• nice
• pleasant
• kind
• lovely

In miła niespodzianka, the idea is usually pleasant or nice:

• a surprise that makes you happy
• an unexpectedly good thing

So nice surprise is a good natural translation, but the Polish word has a slightly broader feel than just one English word.

A useful breakdown is:

• To = this / that / it
• jest = is
• miła = nice / pleasant
• niespodzianka = surprise

So the structure is literally:

• This/That is nice surprise

Then English adds the article:

• This is a nice surprise.

This kind of word-by-word breakdown is helpful, but remember that Polish and English do not always match perfectly.