Add i18nsitemap to your INSTALLED_APPS
In your Sitemap class who supports i18n inherit from i18nsitemap.I18nSitemap instead from django.
Set i18n = True
That's it. And there is no problem on using I18nSitemap on any Sitemap class, no needs to add or remove anything.
Here it follows an example
class BlogSitemap(I18nSitemap):
changefreq = "never"
priority = 0.5
i18n = True
def items(self):
return Entry.objects.filter(is_draft=False)
def lastmod(self, obj):
return obj.pub_date