hangugeoreul maeil yeonseuphada bonikka bareumi johajyeosseoyo.

-다 보니까 is a grammar pattern that means something like:

• while doing X continuously
• after doing X for a while
• as I kept doing X, I noticed/resulted in Y

So in 연습하다 보니까, the speaker is saying that by continuing to practice, a result became clear: 발음이 좋아졌어요.

A key nuance is that this often sounds like:

• the result happened naturally over time, and/or
• the speaker realized the result afterward.

It is not just a plain cause-and-effect statement. It has more of a through experience, this ended up happening feeling.

These are two different grammar patterns.

• 연습하다 보니까 = as I kept practicing / after practicing for a while
• 연습해 보니까 = after trying to practice / after giving it a try

So -아/어 보다 means to try doing something.

But in your sentence, the meaning is about repeated or ongoing practice, not just trying it once. That is why 연습하다 보니까 is the natural choice.

In 한국어를 매일 연습하다, 한국어 is the object of 연습하다.

So:

• 한국어를 연습하다 = to practice Korean

The particle 를 marks the thing being practiced.

This is different from 발음이, where 발음 is not the object of 좋아지다. Instead, it is the thing that became better, so it takes the subject marker 이.

Because 좋아지다 is an intransitive verb meaning to become good / to improve.

That means the thing that changes becomes the subject, not the object.

So:

• 발음이 좋아졌어요 = my pronunciation improved
• literally, pronunciation became better

If you used 발음을, it would sound like pronunciation is the object of another action, but 좋아지다 does not work that way.

Good question. The difference is about change.

• 좋았어요 = was good
• 좋아졌어요 = became good / got better / improved

In this sentence, the speaker is talking about improvement over time, so 좋아졌어요 is the right choice.

So:

• 발음이 좋았어요 = the pronunciation was good
• 발음이 좋아졌어요 = the pronunciation became better

The past tense here shows that the change has already happened by the time the speaker is talking.

So 좋아졌어요 means:

• the pronunciation improved
• it has gotten better

Even if the improvement is still true now, Korean often uses the past tense to show that a change has been completed.

This is very natural with verbs like:

• 늘다 → 늘었어요 = increased
• 줄다 → 줄었어요 = decreased
• 좋아지다 → 좋아졌어요 = became better

매일 means every day, and it shows the action was habitual or repeated.

That matters because -다 보니까 often fits well with actions done:

• repeatedly
• continuously
• over a period of time

So 매일 helps support the idea that the speaker kept practicing regularly, and as a result, their pronunciation improved.

Yes. Both are natural.

Korean word order is flexible as long as the particles make the roles clear.

So these are both fine:

• 한국어를 매일 연습하다 보니까
• 매일 한국어를 연습하다 보니까

The difference is mostly emphasis:

• 한국어를 매일... slightly highlights Korean
• 매일 한국어를... slightly highlights every day

Both sound normal.

They can both connect two ideas, but the nuance is different.

• 연습해서 발음이 좋아졌어요 = I practiced, so my pronunciation improved
  • more direct cause-and-effect
• 연습하다 보니까 발음이 좋아졌어요 = as I kept practicing, my pronunciation improved / I found that my pronunciation had improved
  • more about a result discovered through ongoing experience

So -다 보니까 often sounds:

• more experiential
• more gradual
• less like a simple factual cause

It is especially useful when the result emerged over time.

Yes, often you can.

• 연습하다 보니 발음이 좋아졌어요
• 연습하다 보니까 발음이 좋아졌어요

Both are natural.

Very roughly:

• -다 보니 can sound a little more written, compact, or reflective
• -다 보니까 can sound a little more conversational or explanatory

In everyday speech, both are common.

Very often, yes. It commonly carries a nuance of:

• realizing something later
• noticing a result after repeated action
• ending up in a situation through continued action

So in this sentence, it is not just practice caused improvement. It also suggests something like:

• As I kept practicing every day, I realized my pronunciation had gotten better.

That discovery nuance is one reason learners hear -다 보니까 in personal stories and reflections so often.

The ending 좋아졌어요 is in the standard polite style.

That makes the whole sentence polite and natural for:

• everyday conversation
• speaking to someone you are not extremely close to
• neutral polite speech

You could also change the style:

• 한국어를 매일 연습하다 보니까 발음이 좋아졌어요.
  polite, conversational

• 한국어를 매일 연습하다 보니까 발음이 좋아졌습니다.
  more formal

• 한국어를 매일 연습하다 보니까 발음이 좋아졌어.
  casual, informal

Yes, 연습하다 is very natural for practicing a skill such as language ability or pronunciation.

So:

• 한국어를 연습하다 = practice Korean
• 발음을 연습하다 = practice pronunciation

You could also say things in other ways depending on the focus, for example:

• 한국어를 매일 공부하다 보니까... = as I kept studying Korean every day...
• 발음을 매일 연습하다 보니까... = as I practiced pronunciation every day...

But in your sentence, 연습하다 works very well because pronunciation improvement comes from repeated practice.

Yes, definitely.

That is one of the most natural implications of -다 보니까. It often suggests:

• repetition
• passage of time
• a gradual result

So this sentence feels like:

• the speaker kept practicing Korean every day
• over time, their pronunciation improved
• they noticed that change

If you wanted a sudden-event feeling, you would usually choose a different expression. This one strongly fits gradual development.