Not sure about this but it sounds like that's the meaning!

https://www.persee.fr/doc/ridc_0035-3337_1994_num_46_2_4877
de R Legeais - ‎1994
A. La multiplication des indices d'un recours délibéré au droit comparé

What counts as "purposeful availment" in US law is much less than a thoughtful, specifically intended act. You can "purposely avail" yourself of State X's laws by doing nothing more than driving your car into State X.

Here's an example. If you live in Ohio and want to drive to Chicago, which is in Illinois, you have to drive across Indiana -- and in doing so, you "purposely avail" yourself of Indiana law; as a result, if you happen to get into a car accident while crossing Indiana, Indiana courts have jurisdiction over you if the other driver sues you.

Similarly, if you send a cease-and-desist letter to someone in Indiana, making them reasonably fear that you're going to sue them for something, just sending the letter into Indiana by mail or email may constitute "purposeful availment" sufficient to allow the recipient to sue you in Indiana court (if they happen to have a legal claim against you).

So "volontaire" works much better than "délibéré," because it's really not a thoughtful or deliberate act at all. It can even be accidental (for instance, if you're driving in Ohio, take a wrong turn and end up in Indiana).

Here's a definition: https://www.quimbee.com/keyterms/purposeful-availment

And here's a much longer explanation of US jurisdiction, including explanations of purposeful availment:

"It is always necessary that there be an act 'by which the defendant purposefully avails itself of the privilege of conducting activities within the forum State, thus invoking the benefits and protections of its laws.' Such an act may be a single occurrence, such as driving a car through the territory of the state; it may be the continuous presence of the defendant in the state as a citizen or domiciliary; it may be (and frequently is) something in between. But any time a defendant is by choice physically present in a state, she has benefitted from its legal protections; Hanson is satisfied, a prerequisite of the assertion of jurisdiction though not sufficient to sustain it." https://www.quimbee.com/keyterms/purposeful-availment

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Note added at 7 days (2019-01-31 20:03:56 GMT)
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PS: Here's the correct link for the one-paragraph quote above: http://www.kentlaw.edu/cyberlaw/docs/rfc/usview.html

Please note the difference between INTENTIONAL or VOLUNTARY, and KNOWING. You don't have to know where you are in order to be intentionally driving there.

If you get lost and continue driving without knowing for sure where you are, any consequences of that decision (to voluntarily drive while lost) are on you. The consequences will not be placed on some innocent person whose car you crash into. If you intentionally keep driving, and you happen to cross a state line and cause an accident in the next state, you can be sued in that state.

je pense qu'il est plus approprié de traduire de façon à ce que le concept soit clair plutôt que de se restreindre à une traduction littérale, qui ici n'aurait pas de sens pour un lecteur français.

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Note added at 13 days (2019-02-06 16:14:06 GMT)
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purposeful availment: In the law of civil procedure, an intentional act by one party directed into a particular state, thereby permitting that state to constitutionally assert personal jurisdiction over that party.