Je veux seulement te parler.

Because after vouloir (to want), French normally uses an infinitive for the second verb.

• Je veux parler = I want to speak
• Tu veux manger = You want to eat

So in Je veux seulement te parler, veux is the conjugated verb, and parler stays in the infinitive.

French object pronouns usually come before the verb they belong to.

Here, te means to you, and it goes before parler:

• te parler = to speak to you

Even though English puts to you after the verb, French puts the pronoun before it.

Compare:

• Je veux te voir = I want to see you
• Je veux te parler = I want to speak to you

Te is the object pronoun form, used with a verb.

• Je veux te parler = correct

Toi is a stressed pronoun, used in other situations, for example:

• after a preposition in some cases
• for emphasis
• by itself

Examples:

• Je parle à toi is generally not the normal form; French prefers Je te parle
• Toi, je te parle ! = You, I’m talking to you! (emphasis)

So here, because the pronoun is tied directly to the verb, te is the right choice.

Good question. With a full noun, you usually say:

• parler à Marie
• parler à mon frère

But when à quelqu’un becomes an object pronoun, French often uses an indirect object pronoun instead:

• à toi → te
• à lui → lui
• à nous → nous

So:

• Je veux parler à toi is not the normal wording
• Je veux te parler is the natural form

This is very common in French.

Seulement means only, just, or simply, depending on context.

In this sentence, it limits the action:

• Je veux seulement te parler = I only want to talk to you / I just want to talk to you

It suggests that the speaker does not want anything more complicated or serious than talking.

Yes. In everyday French, juste is very common.

• Je veux juste te parler
• Je veux seulement te parler

Both are natural.
Very roughly:

• juste sounds a bit more conversational
• seulement can sound a bit more neutral or slightly more formal

In many situations, they mean the same thing.

French adverbs like seulement can sometimes move around, but their position can slightly affect emphasis.

• Je veux seulement te parler puts the focus on only wanting to talk
• It suggests: that’s all I want to do

Other placements are possible, but they may sound less natural or change the emphasis:

• Je veux te parler seulement can sound more marked or more literary in some contexts
• Seulement, je veux te parler means something different: However / It’s just that, I want to talk to you

So in your sentence, the placement is natural and clear.

Not exactly, though they can be close.

• parler à quelqu’un = to speak to someone / talk to someone
• parler avec quelqu’un = to talk with someone

In many everyday situations, the difference is small. But:

• parler à often focuses on addressing the person
• parler avec can sound a bit more like a two-way conversation

So Je veux seulement te parler most naturally means I just want to talk to you.

Sometimes, yes. Je veux is direct and can sound strong depending on tone and context.

• Je veux te parler = direct, firm, straightforward
• Je voudrais te parler = softer, more polite
• J’aimerais te parler = also softer and often more natural in polite situations

If someone is emotional, serious, or insistent, Je veux seulement te parler can be perfectly appropriate.
If someone wants to sound gentler, they might choose Je voudrais seulement te parler.

Yes, if you are speaking to:

• more than one person, or
• one person formally

Then you would say:

• Je veux seulement vous parler

So:

• te = informal singular
• vous = formal singular or plural

A simple pronunciation guide is:

zhuh vuh sul-man tuh par-lay

A few points:

• Je sounds like zhuh
• veux sounds roughly like vuh
• seulement is pronounced roughly sul-man
• te often sounds like tuh
• parler sounds like par-lay

The -ent in seulement is not pronounced like English ent; it ends more like man with a nasal vowel.

Not in this sentence.

Te becomes t’ only before a vowel sound:

• Je t’aime
• Je t’écoute

But parler starts with a consonant sound, so it stays:

• Je veux te parler

It is a simple sentence, but it has several clear parts:

• Je = subject
• veux = conjugated verb
• seulement = adverb
• te = object pronoun
• parler = infinitive

So the structure is:

subject + vouloir (conjugated) + adverb + pronoun + infinitive

This pattern is very useful in French:

• Je veux te voir
• Je peux t’aider
• Je vais lui parler

Learning this structure will help you make many everyday sentences.