Laravel 5.1 Gettext gives Call to undefined function App\Models\_() when trying to send email from console command

TL;DR Does anyone know how to inject the Xinax\Gettext dependencies into the Mail-closure?

I have a setup with Laravel 5.1 and the Xinax Gettext package (http://ift.tt/1Ngew03) which works perfectly for translating strings, except for when running an artisan command which attempts to send an email containing a model.

In my model I have a few attribute mutators, for example:

MyModel.php

public function getTranslatedStringAttribute(){
    return _('Translated string');
}

The command calls a repository which sends an email, like this:

public function sendEmailFromRepository(){
    $modelsToInclude = \App\Models\MyModel::get();    

    \Mail::queue('emails.myTemplate', ['theData' => $modelsToInclude], function ($message) {
        $message->from('no-reply@example.org', 'App name');
        $message->to('test@exmaple.org');
        $message->subject('Delivering some stuff to you');
    });
}

Here's the issue, this gives me:

[Symfony\Component\Debug\Exception\FatalErrorException]  
Call to undefined function App\Models\_()

I've figured this is probably because of the \Mail::queue-closure creating a scope which is isolated from the autoloaded helpers, Xinax\Gettext included. Does anyone know how to inject the gettext dependencies into the Mail-closure, or have any other clues on what may be my problem?

via Chebli Mohamed