Creating a fake Translator with Spec Behaviour Driven Development using PhpSpec

GreekTranslatorSpec.php

<?php

namespace spec\FakeTranslator;

use PhpSpec\ObjectBehavior;
use Prophecy\Argument;

class GreekTranslatorSpec extends ObjectBehavior
{
    function it_is_a_translator()
    {
        $this->shouldImplement('FakeTranslator\Translator');
    }
    
    function it_translates_the_word_Welcome_to_Greek()
    {
        $this->translate('Welcome')->shouldReturn('Μαλάκα');
    }

    function it_translates_the_word_Anything_to_Greek()
    {
        $this->translate('Anything')->shouldReturn('Μαλάκα');
    }

    function it_translates_the_word_Yourself_to_Greek()
    {
        $this->translate('Yourself')->shouldReturn('Μαλάκα');
    }

    function it_translates_the_word_Okay_to_Greek()
    {
        $this->translate('Okay')->shouldReturn('Μαλάκα');
    }
}

PolishTranslatorSpec.php

<?php

namespace spec\FakeTranslator;

use PhpSpec\ObjectBehavior;
use Prophecy\Argument;

class PolishTranslatorSpec extends ObjectBehavior
{
    function it_is_a_translator()
    {
        $this->shouldImplement('FakeTranslator\Translator');
    }
    
    function it_translates_the_word_Hello_to_Polish()
    {
        $this->translate('Hello')->shouldReturn('Kurwa');
    }

    function it_translates_the_word_Something_to_Polish()
    {
        $this->translate('Something')->shouldReturn('Kurwa');
    }

    function it_translates_the_word_Mother_to_Polish()
    {
        $this->translate('Mother')->shouldReturn('Kurwa');
    }

    function it_translates_the_word_Okay_to_Polish()
    {
        $this->translate('Okay')->shouldReturn('Kurwa');
    }
}

Translator.php

<?php

namespace FakeTranslator;

interface Translator
{
    /**
     * @param string $phrase
     * 
     * @return string
     */
    public function translate($phrase);
}