Field formatter for field state machine always return the state item value for the entity in the default language

Problem

In a multilingual site, For a node translated, the field state_machine formatter displays the allowed transitions always from the value of the field state in the node from default language.

Proposal

In the StateTransitionForm which load the entity, load the correct translation of this entity.

$this->entity = $this->entityTypeManager->getStorage($entity_type)->load($entity_id);

will become

$entity = $this->entityTypeManager->getStorage($entity_type)->load($entity_id);
$this->entity = $this->entityRepository->getTranslationFromContext($entity);