Feature: #81363 - EXT:form - support form element translation arguments

See Issue #81363

Description

Passing arguments to form element property translations is now supported to enrich translations with variable values.

This works for simple, static values purely in YAML:

renderables:
  fieldWithTranslationArguments:
    identifier: field-with-translation-arguments
    type: Checkbox
    label: This is a %s feature
    renderingOptions:
      translation:
        translationFile: path/to/locallang.xlf
        arguments:
          label:
            - useful

Alternatively, translation arguments can be set via formDefinitionOverrides in TypoScript. A common usecase is a checkbox for user confirmation linking to details of the topic:

renderables:
  fieldWithTranslationArguments:
    identifier: field-with-translation-arguments
    type: Checkbox
    label: I agree to the <a href="%s">terms and conditions</a>
    renderingOptions:
      translation:
        translationFile: path/to/locallang.xlf

Important

There must be at least one translation file with a translation for the configured form element property. Arguments are not inserted into default values defined in a form definition.

The same goes for finisher options:

finishers:
  finisherWithTranslationArguments:
    identifier: EmailToReceiver
    options:
      subject: My %s subject
      recipientAddress: foo@example.org
      senderAddress: bar@example.org
      translation:
        translationFile: path/to/locallang.xlf
        arguments:
          subject:
            - awesome

Impact

Form element property translations and finisher option translations can now use placeholders to output translation arguments.