How to hook after import translation files inside modules [SOLVED]

[Juergen]

Hello,

as introduced in PW 3.0.181 modules can be shipped with translation files. I am trying to hook after the save method of this new functionality, but I could not get it to work.

This hook is inside a module:

  // initialize the hooks
  public function init() {    
      $this->addHookAfter('ProcessLanguage::save', $this, 'testHook');
  }

protected function testHook(HookEvent $event)
  {
    wire('session')->message('test');
  }

Nothing happens!

Does anyone has an idea how to hook this new functionality. I have also tried it with fe ProcessLanguage::executeDownload but without success.

Here is the Github page of the new feature:

https://github.com/processwire/processwire/blob/master/wire/modules/LanguageSupport/ProcessLanguage.module