diff --git a/src/pretix/base/forms/questions.py b/src/pretix/base/forms/questions.py
index 21a89a4679..9fe865fb4a 100644
--- a/src/pretix/base/forms/questions.py
+++ b/src/pretix/base/forms/questions.py
@@ -9,7 +9,6 @@ import pycountry
 import pytz
 import vat_moss.errors
 import vat_moss.id
-from babel import localedata
 from django import forms
 from django.contrib import messages
 from django.core.exceptions import ValidationError
@@ -20,14 +19,14 @@ from django.utils.formats import date_format
 from django.utils.html import escape
 from django.utils.safestring import mark_safe
 from django.utils.timezone import get_current_timezone
-from django.utils.translation import (
-    get_language, gettext_lazy as _, pgettext_lazy,
-)
+from django.utils.translation import gettext_lazy as _, pgettext_lazy
 from django_countries import countries
 from django_countries.fields import Country, CountryField
 from phonenumber_field.formfields import PhoneNumberField
 from phonenumber_field.phonenumber import PhoneNumber
-from phonenumber_field.widgets import PhoneNumberPrefixWidget
+from phonenumber_field.widgets import (
+    PhoneNumberPrefixWidget, PhonePrefixSelect,
+)
 from phonenumbers import NumberParseException, national_significant_number
 from phonenumbers.data import _COUNTRY_CODE_TO_REGION_CODE
 
@@ -35,7 +34,9 @@ from pretix.base.forms.widgets import (
     BusinessBooleanRadio, DatePickerWidget, SplitDateTimePickerWidget,
     TimePickerWidget, UploadedFileWidget,
 )
-from pretix.base.i18n import get_language_without_region, language
+from pretix.base.i18n import (
+    get_babel_locale, get_language_without_region, language,
+)
 from pretix.base.models import InvoiceAddress, Question, QuestionOption
 from pretix.base.models.tax import (
     EU_COUNTRIES, cc_to_vat_prefix, is_eu_country,
@@ -204,7 +205,18 @@ class NamePartsFormField(forms.MultiValueField):
         return value
 
 
+class WrappedPhonePrefixSelect(PhonePrefixSelect):
+    def __init__(self, *args, **kwargs):
+        with language(get_babel_locale()):
+            super().__init__(*args, **kwargs)
+
+
 class WrappedPhoneNumberPrefixWidget(PhoneNumberPrefixWidget):
+
+    def __init__(self, attrs=None, initial=None):
+        widgets = (WrappedPhonePrefixSelect(initial), forms.TextInput())
+        super(PhoneNumberPrefixWidget, self).__init__(widgets, attrs)
+
     def render(self, name, value, attrs=None, renderer=None):
         output = super().render(name, value, attrs, renderer)
         return mark_safe(self.format_output(output))
@@ -564,13 +576,7 @@ class BaseQuestionsForm(forms.Form):
                 if q.valid_datetime_max:
                     field.validators.append(MaxDateTimeValidator(q.valid_datetime_max))
             elif q.type == Question.TYPE_PHONENUMBER:
-                babel_locale = 'en'
-                # Babel, and therefore django-phonenumberfield, do not support our custom locales such das de_Informal
-                if localedata.exists(get_language()):
-                    babel_locale = get_language()
-                elif localedata.exists(get_language()[:2]):
-                    babel_locale = get_language()[:2]
-                with language(babel_locale):
+                with language(get_babel_locale()):
                     default_country = guess_country(event)
                     default_prefix = None
                     for prefix, values in _COUNTRY_CODE_TO_REGION_CODE.items():
diff --git a/src/pretix/base/i18n.py b/src/pretix/base/i18n.py
index b1d52e45a2..99ba153b5f 100644
--- a/src/pretix/base/i18n.py
+++ b/src/pretix/base/i18n.py
@@ -1,5 +1,6 @@
 from contextlib import contextmanager
 
+from babel import localedata
 from django.conf import settings
 from django.utils import translation
 from django.utils.formats import date_format, number_format
@@ -69,6 +70,16 @@ class LazyNumber:
 ALLOWED_LANGUAGES = dict(settings.LANGUAGES)
 
 
+def get_babel_locale():
+    babel_locale = 'en'
+    # Babel, and therefore django-phonenumberfield, do not support our custom locales such das de_Informal
+    if localedata.exists(translation.get_language()):
+        babel_locale = translation.get_language()
+    elif localedata.exists(translation.get_language()[:2]):
+        babel_locale = translation.get_language()[:2]
+    return babel_locale
+
+
 def get_language_without_region(lng=None):
     """
     Returns the currently active language, but strips what pretix calls a ``region``. For example,
diff --git a/src/pretix/presale/forms/checkout.py b/src/pretix/presale/forms/checkout.py
index 6a59c52392..b8e5a223e0 100644
--- a/src/pretix/presale/forms/checkout.py
+++ b/src/pretix/presale/forms/checkout.py
@@ -1,10 +1,9 @@
 from itertools import chain
 
-from babel import localedata
 from django import forms
 from django.core.exceptions import ValidationError
 from django.utils.encoding import force_str
-from django.utils.translation import get_language, gettext_lazy as _
+from django.utils.translation import gettext_lazy as _
 from phonenumber_field.formfields import PhoneNumberField
 from phonenumber_field.phonenumber import PhoneNumber
 from phonenumbers import NumberParseException
@@ -14,7 +13,7 @@ from pretix.base.forms.questions import (
     BaseInvoiceAddressForm, BaseQuestionsForm, WrappedPhoneNumberPrefixWidget,
     guess_country,
 )
-from pretix.base.i18n import language
+from pretix.base.i18n import get_babel_locale, language
 from pretix.base.validators import EmailBanlistValidator
 from pretix.presale.signals import contact_form_fields
 
@@ -39,13 +38,7 @@ class ContactForm(forms.Form):
             )
 
         if self.event.settings.order_phone_asked:
-            babel_locale = 'en'
-            # Babel, and therefore django-phonenumberfield, do not support our custom locales such as de_Informal
-            if localedata.exists(get_language()):
-                babel_locale = get_language()
-            elif localedata.exists(get_language()[:2]):
-                babel_locale = get_language()[:2]
-            with language(babel_locale):
+            with language(get_babel_locale()):
                 default_country = guess_country(self.event)
                 default_prefix = None
                 for prefix, values in _COUNTRY_CODE_TO_REGION_CODE.items():