Django-parler integrated with Django-Rest-Framework for read only applications. When using these classes to create ModelViewSet endpoints, you can select the language using query parameters. For example /api/mymodel/?language=fr

serializers.py

from rest_framework import serializers

class ParlerModelSerializer(serializers.ModelSerializer):
    """Serializer to handle django-parler fields"""

    def __init__(self, *args, **kwargs):
        # Get list of translated fields
        fields = self.Meta.model._translations_model.get_translated_fields()

        # Separate parler fields and scilent fields
        parler_fieds = [x for x in self.Meta.fields if x in fields]
        pas_parler_fields = [x for x in self.Meta.fields if x not in fields]

        # Remove parler fields from default serializer instantiation        
        self.Meta.fields = pas_parler_fields

        # Instantiate default serializer without transtlated fields
        super(ParlerModelSerializer, self).__init__(*args, **kwargs)
        
        # Add requested serializer fields
        for field in parler_fieds:
            self.fields[field] = serializers.Field(source=field)
        
        # Restore original meta fields
        self.Meta.fields += parler_fieds

views.py

from rest_framework import serializers, viewsets

class ParlerModelViewSet(viewsets.ModelViewSet):
    """View set that pre-filters to a django-parler language"""

    def get_queryset(self):
        # Get default queryset
        queryset = super(viewsets.ModelViewSet, self).get_queryset()

        # Get language from query parameters
        language = self.request.QUERY_PARAMS.get('language', None)

        # Update language of queryset accordingly
        if language is not None:
            queryset = queryset.language(language)

        return queryset

An alternative and more complete integration can also be found in the following gist (which inspired this one)
https://gist.github.com/vdboor/a4629d7f3d4158f3a229