Na pchlim targu każde stoisko ma starocie.

Because na takes the locative when it means location, like at or on.

Here, the sentence is saying where something is true: at the flea market. So the basic phrase pchli targ changes into the locative:

• pchli targ = flea market
• na pchlim targu = at the flea market

So both words change form to match the locative.

Because adjectives in Polish must agree with the noun in gender, number, and case.

The noun here is targu, which is:

• masculine
• singular
• locative

So the adjective must match it:

• pchli targ = nominative
• na pchlim targu = locative

So pchli changes to pchlim because of case agreement.

Pchli comes from pchła, which means flea.

So pchli targ is the standard Polish equivalent of flea market. Literally, it is something like flea-related market.

It does not mean the market is actually full of fleas. It is just the normal expression, like in English.

Because stoisko is a neuter noun.

The word każdy changes depending on gender:

• każdy = masculine
• każda = feminine
• każde = neuter

Since stoisko is neuter, the correct form is każde stoisko.

Because każde stoisko is grammatically singular.

Even though the idea refers to many stalls one by one, Polish treats każde stoisko as each stall, so the verb stays singular:

• każde stoisko ma = each stall has

This works like English every stall has, not every stall have.

Stoisko is in the nominative singular because it is the subject of the sentence.

It is the thing that has something:

• każde stoisko = each stall
• ma starocie = has antiques / old items

So stoisko is the subject, and that is why it is nominative.

Stoisko usually means a stall, stand, or booth, especially in a market setting.

In this sentence, każde stoisko means each seller’s place or table at the flea market.

So it is more specific than a whole shop. It is a small selling spot within the market.

Starocie means old things, old objects, or antiques/second-hand old items, depending on context.

At a flea market, it often suggests things like:

• old household objects
• vintage items
• collectibles
• antiques
• miscellaneous old stuff

It is a broad word. It can sound a little less formal than antyki, which is closer to antiques in a stricter sense.

Here starocie is the direct object of ma, so it is in the accusative plural.

After mieć (to have), Polish normally uses the accusative for the thing possessed.

In this case, starocie looks the same as the nominative plural. That is normal for many non-masculine-personal plural nouns in Polish.

Yes, this word order is natural.

Na pchlim targu comes first to set the scene: at the flea market. Then the sentence says what is true there: every stall has old items.

Polish word order is flexible, so other versions are possible, for example:

• Każde stoisko ma starocie na pchlim targu
• Starocie ma każde stoisko na pchlim targu

But the original sentence sounds clear and neutral. It is a good standard word order.

Yes. Pchli targ is a normal and common way to say flea market.

You may also see targ staroci, which is close to antiques market or market of old things. The two expressions often overlap, but they are not always identical in nuance:

• pchli targ = flea market
• targ staroci = antiques / old-items market

In everyday use, though, both can refer to a place where people sell old second-hand items.