django-modeltranslation Default language doesn't work

Hello!

I have problem with default language which doesn't seem to work properly.

I'm using: Django==2.1.4 django-modeltranslation==0.13.

Here is my settings:

LANGUAGE_CODE = 'en'

LANGUAGES = (
    ('pl', _('Polish')),
    ('en', _('English')),
    ...
)
MODELTRANSLATION_LANGUAGES = ('pl', 'en', 'ru', 'es', 'de', 'fr', 'it', 'pt')
MODELTRANSLATION_DEFAULT_LANGUAGE = 'pl'

Here is model registering:

@register(MyModel)
class MyModelTranslationOptions(TranslationOptions):
    fields = ('name', 'slug',)

Here is output from Django shell:

In [1]: MyModel.objects.last().name                                                                                                                                       
Out[1]: 'name_en'

In [2]: MyModel.objects.last().name_en                                                                                                                                    
Out[2]: 'name_en'

In [3]: MyModel.objects.last().name_pl                                                                                                                                    
Out[3]: 'name_pl'

In [4]: settings.MODELTRANSLATION_DEFAULT_LANGUAGE                                                                                                                           
Out[4]: 'pl'

In [5]: from modeltranslation import settings as s                                                                                                                           

In [6]: s.DEFAULT_LANGUAGE                                                                                                                                                   
Out[6]: 'pl'

Why does my app return English field version, but not Polish one? Maybe I'm doing something wrong?