koko nara, nihongo o benkyou dekiru.

I can study Japanese here.

Breakdown of koko nara, nihongo o benkyou dekiru.

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

Questions & Answers about koko nara, nihongo o benkyou dekiru.

Why does the sentence use なら after ここ instead of a particle like で?

なら here gives a nuance of “if it’s here / as for here” rather than just “at here”.

• ここで日本語を勉強できる = You can study Japanese at this place (simple statement of location).
• ここなら日本語を勉強できる = If it’s here (as opposed to somewhere else), you can study Japanese / Here, at least, you can study Japanese.

So なら adds:

• a sense of condition: “if X is the case…”
• or contrast/limitation: “speaking of X (and maybe not other places), …”

It often implies that other places might not be OK, but here is OK.

What is the subject of this sentence? There’s no I or you.

Japanese often omits the subject if it’s clear from context.

ここなら、日本語を勉強できる。 could mean, depending on context:

• (私は) ここなら、日本語を勉強できる。
  → I can study Japanese here (if it’s here).
• (あなたは) ここなら、日本語を勉強できる。
  → You can study Japanese here.
• (ここでは人が) 日本語を勉強できる。
  → People can study Japanese here.

In real conversations, who “can” do it is usually understood from the situation, so the pronoun is dropped.

Why is を used after 日本語? Isn’t just a language?