sakura ga tiru mae ni, mou itido kazoku to mi ni ikitai desu.

桜が散る前に means before the cherry blossoms fall.

Here, が marks 桜 as the subject of 散る (to fall/scatter). The sentence is talking about the event of the cherry blossoms falling, so 桜が散る is a complete clause: the cherry blossoms fall.

If you used は, it would sound more like setting 桜 up as a topic for contrast or general discussion. In this sentence, が is the most natural choice because 桜 is simply the subject inside the before... clause.

散る means to scatter, fall, come off, fade away. With cherry blossoms, it refers to the petals falling from the trees.

So 桜が散る means the cherry blossoms fall or the blossoms scatter.

This verb is very commonly used with flowers, especially cherry blossoms.

With 前に (before), Japanese usually uses the dictionary form of the verb:

• 散る前に = before they fall
• 食べる前に = before eating
• 行く前に = before going

By contrast, after is usually expressed with た-form + 後で/後に:

• 散った後で = after they fell
• 食べた後で = after eating

So 散る前に is the normal grammar pattern.

In this pattern, に is part of the time expression.

• V dictionary form + 前に = before doing V
• Noun + の + 前に = before N

Examples:

• 寝る前に = before sleeping
• 食事の前に = before the meal

So in 桜が散る前に, the に helps mark the time point before the blossoms fall.

もう一度 means once more, one more time, or again.

• もう = more / another
• 一度 = one time / once

So もう一度見に行きたいです means I want to go see them one more time.

It often implies that the speaker has seen them already and wants to do it again.

Because と means with here.

• 家族と見に行く = go to see it with my family
• 家族を見る = see my family

In this sentence, the speaker is not saying they want to see their family. They want to go see the cherry blossoms together with their family.

So:

• 家族と = with family
• the thing being seen is understood from context: the cherry blossoms

見に行く is a very common grammar pattern:

verb stem + に + 行く
= go in order to do something

Here:

• 見る = to see
• verb stem = 見
• 見に行く = go to see

So:

• 桜を見に行く = go to see the cherry blossoms
• 映画を見に行く = go to see a movie
• 食べに行く = go to eat

In your sentence, the object 桜を is omitted because it is already clear from context.

Because this pattern uses the verb stem.

For 見る:

• dictionary form: 見る
• stem: 見

Then:

• 見に行く
• 見に来る
• 見たい

So 見に行きたい is built from the stem 見 plus the rest of the grammar.

Because たい attaches to the verb stem, not the dictionary form.

For 行く:

• dictionary form: 行く
• stem: 行き
• 行きたい = want to go

More examples:

• 食べる → 食べたい
• 飲む → 飲みたい
• 話す → 話したい

So 見に行きたい means want to go see.

たい behaves like an i-adjective in many ways, so it can be followed by です for politeness.

• 行きたい = plain
• 行きたいです = polite

So 見に行きたいです is a polite way to say I want to go see.

A less formal version would be:

• 桜が散る前に、もう一度家族と見に行きたい。

Yes, if you say it fully, you could say:

桜が散る前に、もう一度家族と桜を見に行きたいです。

But Japanese often omits things that are obvious from context. Since the sentence already starts with 桜, it is clear that the speaker wants to go see the cherry blossoms again.

So the omitted object is understood naturally.

Japanese often leaves out the subject when it is obvious.

In English, you usually need I:
I want to go see them one more time with my family before the cherry blossoms fall.

In Japanese, if it is clear that the speaker is talking about their own wish, 私は is usually unnecessary.

You could add it for emphasis:

• 私は、桜が散る前に、もう一度家族と見に行きたいです。

But without it, the sentence sounds more natural in many situations.

Here it naturally means my family.

Japanese often omits words like my, your, and the when the meaning is clear from context. Since the speaker is talking about what they want to do, 家族 is normally understood as my family.

So:

• 家族と = with my family

Yes. Both are fine in English.

• want to go and see
• want to go see

The Japanese structure literally means want to go in order to see, but natural English usually says want to go see.

A useful breakdown is:

桜が散る前に
= before the cherry blossoms fall

もう一度
= one more time / again

家族と
= with my family

見に行きたいです
= want to go see

So the sentence is built like this:

[Before X happens], [again], [with family], [want to go see].

Japanese often puts the background information first and the main point at the end. Here, the main point is 行きたいです.