kanojo wa shourai nihongo de shousetsu o kaku sakka ni naritai to itte imasu.

She says she wants to become a writer who writes novels in Japanese in the future.

Breakdown of kanojo wa shourai nihongo de shousetsu o kaku sakka ni naritai to itte imasu.

• は: topic particle
• を: direct object particle
• 日に本ほん語ご: Japanese (language)

Questions & Answers about kanojo wa shourai nihongo de shousetsu o kaku sakka ni naritai to itte imasu.

What is the role of は after 彼女, and why isn’t が used?

彼女は marks 彼女 as the topic of the sentence – what the sentence is about.

• は: topic marker – “As for her, (she...)”
• が: subject marker – often introduces new, specific information or focuses on who actually does the action.

In a neutral, descriptive sentence about someone you already know, 彼女は is more natural than 彼女が. It sets up “her” as the background topic, then tells you what she says/wants. Using 彼女が here would sound like you’re contrasting her with someone else or emphasizing that she (and not someone else) is the one who says this.

Why is there no particle after 将来?

将来 is an adverbial noun here, working like an adverb (“in the future”), so it can appear without a particle before the verb phrase:

• 将来 日本語で小説を書く作家になりたい
  → “(She) wants to become a writer who writes novels in Japanese in the future.”

You can sometimes say 将来は to make “in the future” itself the topic:

• 将来は 日本語で小説を書く作家になりたい。
  “As for the future, I want to become...”

But 将来に in this sense is usually unnatural; 将来 without a particle is the normal way to say “in the future” here.

What does 日本語で mean, and why is the particle で used instead of を or に?