Lubię zapach świeżego chleba w kuchni.

Because lubię is the 1st person singular form of the verb lubić in the present tense, so it means I like.

A quick pattern:

• ja lubię — I like
• ty lubisz — you like
• on/ona lubi — he/she likes
• my lubimy — we like
• wy lubicie — you (plural) like
• oni/one lubią — they like

So the ending -ę tells you the subject is I, which is why Polish often leaves out ja.

Polish does not have articles like a/an or the.

So:

• zapach can mean a smell or the smell
• chleba can mean of bread or of the bread

You understand whether it is general or specific from the context.

Here zapach is the direct object of lubię: I like the smell.

In Polish, masculine inanimate nouns often have the same form in the nominative and accusative singular.
Since zapach is masculine inanimate, its accusative singular is still zapach.

So:

• zapach — nominative: smell
• lubię zapach — accusative: I like the smell

Because after zapach Polish normally uses the genitive: the smell of something.

So:

• chleb — bread
• zapach chleba — the smell of bread

This is very common with nouns like:

• zapach kawy — the smell of coffee
• smak zupy — the taste of soup
• kolor nieba — the color of the sky

So chleba is the genitive singular form of chleb.

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

Here świeżego describes chleba, and chleba is:

• masculine
• singular
• genitive

So the adjective also has to be masculine singular genitive:

• świeży chleb — fresh bread
• zapach świeżego chleba — the smell of fresh bread

It is the locative case, because w means in here and is used to show location.

• kuchnia — kitchen
• w kuchni — in the kitchen

This is different from movement:

• jestem w kuchni — I am in the kitchen
• idę do kuchni — I am going to the kitchen

So in your sentence, w kuchni tells you where something is happening or where the smell is being experienced.

It can be a little ambiguous without context.

Lubię zapach świeżego chleba w kuchni most naturally suggests something like:

• I like the smell of fresh bread in the kitchen
• meaning the pleasant smell in that place

But grammatically, w kuchni could also be understood as modifying chleba in some contexts. In everyday use, people usually rely on context and intonation.

If you wanted to make the location more clearly apply to the whole sentence, you could also say:

• Lubię w kuchni zapach świeżego chleba.
• W kuchni lubię zapach świeżego chleba.

These versions emphasize in the kitchen more clearly.

Yes. Polish word order is more flexible than English because case endings show the grammatical relationships.

The neutral order here is:

• Lubię zapach świeżego chleba w kuchni.

But you could also say:

• W kuchni lubię zapach świeżego chleba. — emphasizes in the kitchen
• Zapach świeżego chleba lubię w kuchni. — stronger focus/contrast, less neutral

The meaning stays similar, but the focus changes.

Because the verb form already tells you the subject.

• lubię already means I like

So ja is usually omitted unless you want emphasis or contrast:

• Ja lubię zapach świeżego chleba, ale on nie.
  I like the smell of fresh bread, but he doesn’t.

In a normal standalone sentence, Lubię... is perfectly natural.

Lubię means I like or I enjoy.
Kocham means I love.

So:

• Lubię zapach świeżego chleba w kuchni. — I like the smell of fresh bread in the kitchen.
• Kocham zapach świeżego chleba w kuchni. — I love the smell of fresh bread in the kitchen.

Both are correct, but kocham is stronger.

Chleb by itself just means bread.
Świeży chleb means fresh bread.

When you put it after zapach, both words change because of the genitive:

• świeży chleb — fresh bread
• zapach świeżego chleba — the smell of fresh bread

So the phrase is not random: it follows normal agreement and case rules.

A rough English-friendly guide is:

Lubię zapach świeżego chleba w kuchni
≈ loo-BYEH ZAH-pakh shfyeh-ZHEH-go KHLEH-bah f kooKH-nee

A few helpful notes:

• ę in lubię is a nasal vowel; in normal speech it often sounds close to -e / -eh at the end
• ch is like a harsh h, as in Scottish loch
• ś is a soft sh
• rz/ż sounds like the s in measure
• w in Polish sounds like English v, but in w kuchni it is often devoiced and may sound closer to f

You do not need perfect pronunciation right away; the most important thing is recognizing the main sounds and stress pattern.