[Ninja Forms] Repeater Fields not available in the translation editor

Overview of the issue

Ninja Forms has a new feature called Repeatable Fields. This feature is not yet available for translation in our Advanced Translations Editor. However, we are planning to make it compatible soon.

Workaround

• Please, make a full backup of you site before proceeding.
• Now that you have your backup ready, we need to modify 2 files:
• Open /wp-content/plugins/wpml-ninja-forms/classes/Hooks/NinjaForms/Strings.php.
• Look for the line 76:

  $package->registerField( $field->get_id(), $field->get_settings() );
  

• And just after add:

  				// Register repeater fields strings
  				if ( 'repeater' === $field->get_settings( 'type' ) && $field->get_settings()['fields'] ) {
  					foreach ( $field->get_settings()['fields'] as $subfield) {
  						$package->registerField( $subfield['id'], $subfield );
  					}
  
  				}
  

• Then open /wp-content/plugins/wpml-ninja-forms/vendor/wpml/forms/classes/Translation/Package.php.
• Look for the line 314:

  return $data;

• And just before add:

  		// Translate repeater fields strings
  		if ( $data['fields'] ) {
  			foreach ( $data['fields'] as $key => $field ) {
  				$forTranslation = $this->fieldProperties->forTranslation( $field );
  				foreach ( $forTranslation as $propertyName => $translationSettings ) {
  					$stringValue = $this->fieldProperties->getValue( $field, $propertyName );
  					if ( $stringValue ) {
  						if ( $this->isArray( $stringValue, $translationSettings ) ) {
  							$field[ $propertyName ] = $this->translateOptions(
  								$stringValue,
  								$field['id'],
  								$translationSettings
  							);
  						} else {
  							$data['fields'][$key][$propertyName] = $this->translateString(
  								$stringValue,
  								$field['id'],
  								$propertyName
  							);
  						}
  					}
  				}
  			}
  		}