Paul soupire quand le logiciel plante.

Soupire is the verb form. The infinitive is soupirer = to sigh.

Here it is conjugated in the present tense for il / elle / on because the subject is Paul:

• je soupire = I sigh
• tu soupires = you sigh
• il/elle soupire = he/she sighs

So Paul soupire means Paul sighs.

Because Paul is a proper noun (a person’s name). In French, as in English, you normally do not put an article before someone’s first name in a neutral sentence.

So:

• Paul soupire = Paul sighs

not

• Le Paul soupire ❌

Quand usually means when.

In this sentence, it introduces the time clause:

• Paul soupire = Paul sighs
• quand le logiciel plante = when the software crashes

So quand links the two ideas, just like when in English.

You could also sometimes see lorsque, which also means when, but quand is very common and natural in everyday French.

French usually needs an article before a noun more often than English does.

So French says:

• le logiciel = the software / the program

Even where English might sometimes say just software, French often still uses an article.

Here, le logiciel is the subject of the second clause, so the article is required.

It can depend on context.

• un logiciel = a piece of software / a program
• le logiciel = the software / the program

In this sentence, le logiciel most naturally refers to the software/program in question—the one that crashes.

So although English software is often uncountable, French logiciel is commonly treated as a normal countable noun.

Good question. Plante can indeed be a noun meaning plant, but here it is not a noun. It is a verb.

The verb is planter. In tech/informal usage, planter can mean:

• to crash
• to freeze
• to fail

So:

• le logiciel plante = the software crashes

This is a very common use in spoken and everyday French, especially for computers, apps, and programs.

Because the whole sentence describes either:

• a habitual situation, or
• a general truth, or
• something presented as happening in real time

French often uses the present tense where English also uses the present:

• Paul soupire quand le logiciel plante.
• Paul sighs when the software crashes.

This can mean whenever the software crashes, Paul sighs.

It can often suggest whenever, depending on context.

The French present tense is commonly used for repeated or habitual actions, so this sentence may imply:

• Paul sighs whenever the software crashes

If you wanted to make the repeated meaning more explicit, French could also say:

• Paul soupire chaque fois que le logiciel plante.
  = Paul sighs every time the software crashes.

But the original sentence is perfectly natural.

Because this is a normal declarative statement. French basic word order is:

• subject + verb

So:

• Paul = subject
• soupire = verb

And in the second clause:

• le logiciel = subject
• plante = verb

There is no need for inversion here because this is not a question.

A rough English-style guide:

• soupire ≈ soo-peer
• quand ≈ kahn (nasal ending; not a strong d sound)
• logiciel ≈ loh-zhee-syel
• plante ≈ plahnt

A few useful notes:

• In quand, the an is nasal.
• In logiciel, the g sounds like the s in measure.
• In plante, the final e is normally silent.

Yes, in everyday French, se planter can also be used informally for something crashing or going wrong.

So you may hear:

• le logiciel plante
• le logiciel se plante

Both can occur in informal usage, though le logiciel plante is very straightforward and common.

In learner French, it is best to understand the original sentence first:

• planter here = to crash