Moja kuzynka chce zostać tłumaczką, ale jej chłopak uważa, że byłaby też dobrą programistką.

Moja kuzynka is in the nominative singular feminine, because it is the subject of the sentence.

• moja = my for a feminine singular noun
• kuzynka = female cousin

Polish adjectives and possessive words like mój / moja / moje must agree with the noun in gender, number, and case.

So:

• mój kuzyn = my male cousin
• moja kuzynka = my female cousin

Yes. English usually does not distinguish male and female in cousin, but Polish does.

• kuzyn = male cousin
• kuzynka = female cousin

Polish very often marks gender directly in the noun, especially for people.

Chce zostać means wants to become.

• chce = wants
• zostać = to become

In this sentence, zostać does not mean to stay. Depending on context, zostać can mean different things, but here it clearly means become.

So:

• Moja kuzynka chce zostać tłumaczką = My cousin wants to become a translator

Polish commonly uses zostać when talking about becoming a profession or something new.

Because after zostać and in this kind of predicate expression, Polish uses the instrumental case.

So:

• tłumaczka → tłumaczką
• programistka → programistką

This is very common with professions, roles, and identities after verbs like:

• być = to be
• zostać = to become

Examples:

• Jest nauczycielką. = She is a teacher.
• Chce zostać lekarką. = She wants to become a doctor.

The ending -ą is a typical instrumental singular ending for many feminine nouns.

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

Since programistką is:

• feminine
• singular
• instrumental

the adjective dobra must also become feminine singular instrumental:

• dobra programistka = a good programmer
• dobrą programistką = a good programmer / as a good programmer

So both words change together:

• programistka → programistką
• dobra → dobrą

Here jej means her.

So:

• jej chłopak = her boyfriend

A useful point: in Polish, jej does not change its form here the way English learners might expect. It can function as a possessive word meaning her, regardless of the gender of the noun that follows.

Examples:

• jej brat = her brother
• jej siostra = her sister
• jej chłopak = her boyfriend

It means the boyfriend belongs to or is associated with her, not that the boyfriend is feminine.

Yes, it is a very common pattern.

• uważać = to think, consider, believe
• że = that

So:

• uważa, że... = he thinks that...

This introduces a clause with someone’s opinion.

Example:

• Uważam, że to dobry pomysł. = I think that it is a good idea.

In everyday English, that is often omitted, but in Polish że is normally expressed.

Byłaby is the conditional form, meaning would be.

So:

• jest = is
• będzie = will be
• byłaby = would be

The boyfriend is giving an opinion about a possibility or hypothetical situation:

• he thinks she would also be a good programmer

This is softer and more hypothetical than saying she is one.

Grammatically, byłaby is:

• based on the past form była
• plus the conditional particle by

For feminine singular:

• byłaby = she would be

Compare:

• byłby = he would be
• byłabym = I would be
• byłaby = she would be

Też means also or too.

In this sentence:

• byłaby też dobrą programistką = would also be a good programmer

It suggests that besides being a translator, she could also be good as a programmer.

Polish word order is more flexible than English, so też can sometimes move around depending on emphasis. Here it sounds natural and emphasizes the additional possibility.

Yes. They are feminine forms.

• tłumacz = male translator / sometimes general translator
• tłumaczka = female translator
• programista = male programmer / sometimes generic in older usage
• programistka = female programmer

Modern Polish often uses feminine profession names when referring to women, especially in sentences like this one. A learner should know that job titles in Polish often have masculine and feminine forms.

Yes, that is a very close literal breakdown.

Word by word:

• Moja kuzynka = my cousin
• chce zostać tłumaczką = wants to become a translator
• ale = but
• jej chłopak = her boyfriend
• uważa, że = thinks that
• byłaby też dobrą programistką = she would also be a good programmer

That literal version matches the Polish structure very well.

The basic version is natural as written, but Polish word order is fairly flexible.

The given sentence:

• Moja kuzynka chce zostać tłumaczką, ale jej chłopak uważa, że byłaby też dobrą programistką.

works as a neutral, standard sentence.

Polish can move elements for emphasis, especially words like też, but not every rearrangement sounds equally natural. The current version is a good model for learners because it is clear and idiomatic.