syuumatu ni hutari de eki mae no kafe de nihongo wo rensyuusimasen ka.

They do two different jobs:

• 二人で = the two of us / together as two people
  • Here, で shows the group or means by which the action is done.
• カフェで = at the café
  • Here, で marks the place where the action happens.

So:

• 二人で = together, the two of us
• 駅前のカフェで = at the café in front of the station

Even though both are で, their meanings depend on what comes before them.

Not quite. 二人 means two people, but 二人で means the two of us together or with two people.

In this sentence, it sounds like:

• Shall we practice Japanese together, the two of us...?

If you removed で and just said 二人, it would not work the same way here.

Examples:

• 一人で行きます。 = I’ll go alone.
• 三人で食べます。 = The three of us will eat.

So X人で often means in a group of X people.

に marks a specific time when something happens.

So:

• 週末に = on the weekend / this weekend

This is similar to how に is used with many time expressions:

• 月曜日に = on Monday
• 三時に = at 3 o’clock

That said, with some time words, に may be omitted in casual speech. But 週末に is very natural and clear.

By itself, 週末 can mean the weekend or weekends, depending on context.

In this sentence, because it is an invitation, it most naturally sounds like:

• this weekend
• or on the weekend in a specific upcoming sense

If someone wanted to make this weekend extra explicit, they could say:

• 今週末に = this weekend

So the original sentence is natural, but context decides exactly which weekend is meant.

駅前 means in front of the station or the area around the front of the station.

• 駅 = station
• 前 = front
• 駅前 is a common fixed expression

It is related to 駅の前, but they are not always identical in feeling:

• 駅の前 = directly in front of the station
• 駅前 = the station-front area, often a general neighborhood or district

So 駅前のカフェ means:

• the café near/in front of the station
• more naturally, the café by the station

の connects nouns and shows a relationship between them.

Here:

• 駅前 = station-front area
• カフェ = café
• 駅前のカフェ = the café by the station / the café in front of the station

You can think of it as something like:

• the station-front café
• the café at the station-front area

This is one of the most common uses of の: noun + の + noun.

を marks the direct object of the verb.

Here the verb is 練習します = practice.

So:

• 日本語を練習します = practice Japanese

The thing being practiced is 日本語, so it gets を.

Both are possible.

• 日本語を練習します = practice Japanese
• 日本語の練習をします = do Japanese practice / practice Japanese

The first is shorter and very natural. The second is a bit more noun-based, because 練習 is treated as a noun: practice of Japanese.

So in this sentence, 日本語を練習しませんか is completely normal.

Yes, it is grammatically negative, but in Japanese this pattern is often used to make a polite invitation.

• 練習します = will practice / practice
• 練習しませんか = won’t you practice...? / would you like to practice...?

In English, a negative question can also sound like an invitation:

• Won’t you come with me?
• Wouldn’t you like to sit down?

So 練習しませんか is a soft, polite way to say:

• Shall we practice Japanese?
• Would you like to practice Japanese?

It is both grammatically a question and functionally an invitation/suggestion.

The speaker is not just asking for information. They are proposing an activity.

So the feeling is:

• Would you like to practice Japanese...?
• How about practicing Japanese...?

This form is very common for polite invitations.

Japanese often omits subjects when they are understood from context.

In English, you usually need to say:

• Shall we practice Japanese this weekend?

In Japanese, if the situation already makes it clear who is involved, the subject is simply left out.

Here, 二人で already strongly suggests:

• the two of us

So there is no need to explicitly say 私たちは or あなたと私は.

A helpful breakdown is:

• 週末に = on the weekend
• 二人で = the two of us together
• 駅前のカフェで = at the café by the station
• 日本語を = Japanese
• 練習しませんか = won’t you practice? / shall we practice?

Japanese usually puts the verb at the end, so the sentence builds up the context first and finishes with the action.

A very literal order would be:

• On the weekend, together as two people, at the café by the station, Japanese, won’t [we] practice?

That sounds strange in English, but it is normal in Japanese.

練習する is a suru-verb.

Its polite non-past form is:

• 練習します

Its polite negative non-past form is:

• 練習しません

Then adding か makes it a question:

• 練習しませんか

So the pattern is:

• dictionary form: 練習する
• polite: 練習します
• polite negative: 練習しません
• polite negative question/invitation: 練習しませんか

Yes, it is natural and polite.

A native speaker might write it without spaces:

• 週末に二人で駅前のカフェで日本語を練習しませんか。

And in normal writing, the final punctuation would usually be:

• ？ for a question, or sometimes no punctuation in casual writing

So a more typical written version would be:

• 週末に二人で駅前のカフェで日本語を練習しませんか？

The spaced version is just for learners to see the parts more easily.

Yes, that is an excellent natural translation.

It captures all the parts:

• 週末に = this weekend / on the weekend
• 二人で = just the two of us
• 駅前のカフェで = at a café by the station
• 日本語を練習しませんか = shall we practice Japanese?

That translation sounds very natural in English and matches the tone well.