Just vague enough to cover the 'diversified or hybrid relief' vs. fast- or multi-track angle.

AT's ref. suggests a 'small claims' angle: 'Avant le procès, un règlement amiable du litige doit être tenté pour les litiges jusqu'à 5 000 €.'

Cut to County Court / District Judges (previously known as 'Registrars') in E&W.

This is so particular that any attempt to equate it with the remit of an American or British judge is bound to fail.
If the translation is followed by an explanation, then the reader will understand, If not, then you may have to add in translator notes
A literal translation has the merits of reminding the reader that this is the French legal system which does not always correspond to an Anglo-Saxon one.

The dispute resolution Judge is a magistrate attached to the Judiciary Tribunal, whose role is to judge certain issues or cases connected to vulnerable people, such as debt cases or tenancy and rental cases. There's a new rule created by justice reform in the event of a combination of an instance tribunal with a larger instance tribunal. Each stage of the judiciary process has at least one Judge.

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Note added at 5 days (2022-02-13 07:57:32 GMT)
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FR:
Un Juge des résolutions des disputes est un magistrat lié avec le tribunal judiciaire, le rôle de qui est de juger des cas certains et des questions connectées aux personnes vulnérables, tels comme des cas en ce qui concernent les dettes, les contrâts des louements et les locateurs. Il y a un règlement nouveau composé des réformations de la justice aux cas des combinations d'un tribunal de l'instance primière avec un tribunal d'une instance plus grande. Chaque étape du procès judiciare a un juge au moins.

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Note added at 5 days (2022-02-13 08:40:29 GMT)
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"A Judge is a public official vested with the authority to hear, determine and preside over legal matters brought to a Court of Law. In jury cases the Judge presides over the panel and instructs it concerning pertinent law. The Judge also may rule on motions made before or during a trial. In countries with a civil law tradition, a more active role customarily has been assigned to a Judge than in countries with a common law tradition. In civil law courts the procedure is inquisitorial while in common law courts the system is adversarial with the questioning of witnesses and the presentation of evidence."
One can read that the roles and expectations of Judges vary depending on the system of law which presides in the relevant country or district authority.

https://www.britannica.com/topic/judge-law

No even approximate UK English equivalent, and certainly not a short one.

So, since the role is defined in a little detail just below, leave the French in French but put it in italics.
Not everything can be translated succinctly, for cultural reasons.

Julie, do you need a translation for later in your text, if the term crops up again?