diff --git a/app/helpers/languages_helper.rb b/app/helpers/languages_helper.rb
index f3ed7b3140c..3a65af68695 100644
--- a/app/helpers/languages_helper.rb
+++ b/app/helpers/languages_helper.rb
@@ -209,8 +209,8 @@ module LanguagesHelper
     'zh-TW': '繁體中文（臺灣）',
   }.freeze
 
-  def human_locale(locale)
-    if locale == 'und'
+  def native_locale_name(locale)
+    if locale.blank? || locale == 'und'
       I18n.t('generic.none')
     elsif (supported_locale = SUPPORTED_LOCALES[locale.to_sym])
       supported_locale[1]
@@ -221,6 +221,16 @@ module LanguagesHelper
     end
   end
 
+  def standard_locale_name(locale)
+    if locale.blank?
+      I18n.t('generic.none')
+    elsif (supported_locale = SUPPORTED_LOCALES[locale.to_sym])
+      supported_locale[0]
+    else
+      locale
+    end
+  end
+
   def valid_locale_or_nil(str)
     return if str.blank?
 
diff --git a/app/lib/admin/metrics/dimension/languages_dimension.rb b/app/lib/admin/metrics/dimension/languages_dimension.rb
index a6aaf5d2155..1cc5f41207d 100644
--- a/app/lib/admin/metrics/dimension/languages_dimension.rb
+++ b/app/lib/admin/metrics/dimension/languages_dimension.rb
@@ -20,6 +20,6 @@ class Admin::Metrics::Dimension::LanguagesDimension < Admin::Metrics::Dimension:
 
     rows = ActiveRecord::Base.connection.select_all(sql, nil, [[nil, @start_at], [nil, @end_at], [nil, @limit]])
 
-    rows.map { |row| { key: row['locale'], human_key: human_locale(row['locale']), value: row['value'].to_s } }
+    rows.map { |row| { key: row['locale'], human_key: standard_locale_name(row['locale']), value: row['value'].to_s } }
   end
 end
diff --git a/app/lib/admin/metrics/dimension/tag_languages_dimension.rb b/app/lib/admin/metrics/dimension/tag_languages_dimension.rb
index 1cfa07478eb..afbc8cde8ac 100644
--- a/app/lib/admin/metrics/dimension/tag_languages_dimension.rb
+++ b/app/lib/admin/metrics/dimension/tag_languages_dimension.rb
@@ -25,7 +25,7 @@ class Admin::Metrics::Dimension::TagLanguagesDimension < Admin::Metrics::Dimensi
 
     rows = ActiveRecord::Base.connection.select_all(sql, nil, [[nil, params[:id]], [nil, Mastodon::Snowflake.id_at(@start_at, with_random: false)], [nil, Mastodon::Snowflake.id_at(@end_at, with_random: false)], [nil, @limit]])
 
-    rows.map { |row| { key: row['language'], human_key: human_locale(row['language']), value: row['value'].to_s } }
+    rows.map { |row| { key: row['language'], human_key: standard_locale_name(row['language']), value: row['value'].to_s } }
   end
 
   private
diff --git a/app/views/admin/accounts/show.html.haml b/app/views/admin/accounts/show.html.haml
index 3867d1b19e6..f3853d629e1 100644
--- a/app/views/admin/accounts/show.html.haml
+++ b/app/views/admin/accounts/show.html.haml
@@ -147,7 +147,7 @@
 
           %tr
             %th= t('simple_form.labels.defaults.locale')
-            %td= @account.user_locale
+            %td= standard_locale_name(@account.user_locale)
             %td
 
           %tr
diff --git a/app/views/admin/follow_recommendations/show.html.haml b/app/views/admin/follow_recommendations/show.html.haml
index 48c1ad1f284..272681864a9 100644
--- a/app/views/admin/follow_recommendations/show.html.haml
+++ b/app/views/admin/follow_recommendations/show.html.haml
@@ -13,7 +13,7 @@
     .filter-subset.filter-subset--with-select
       %strong= t('admin.follow_recommendations.language')
       .input.select.optional
-        = select_tag :language, options_for_select(I18n.available_locales.map { |key| key.to_s.split(/[_-]/).first.to_sym }.uniq.map { |key| [human_locale(key), key]}, @language)
+        = select_tag :language, options_for_select(I18n.available_locales.map { |key| key.to_s.split(/[_-]/).first.to_sym }.uniq.map { |key| [standard_locale_name(key), key]}, @language)
 
     .filter-subset
       %strong= t('admin.follow_recommendations.status')
diff --git a/app/views/admin/trends/links/_preview_card.html.haml b/app/views/admin/trends/links/_preview_card.html.haml
index b88c1be2f6a..d88e06bfdf1 100644
--- a/app/views/admin/trends/links/_preview_card.html.haml
+++ b/app/views/admin/trends/links/_preview_card.html.haml
@@ -13,7 +13,7 @@
         •
 
       - if preview_card.language.present?
-        = human_locale(preview_card.language)
+        = standard_locale_name(preview_card.language)
         •
 
       = t('admin.trends.links.shared_by_over_week', count: preview_card.history.reduce(0) { |sum, day| sum + day.accounts })
diff --git a/app/views/settings/preferences/appearance/show.html.haml b/app/views/settings/preferences/appearance/show.html.haml
index 14941d5fd3f..9e3964f2176 100644
--- a/app/views/settings/preferences/appearance/show.html.haml
+++ b/app/views/settings/preferences/appearance/show.html.haml
@@ -7,7 +7,7 @@
 = simple_form_for current_user, url: settings_preferences_appearance_path, html: { method: :put, id: 'edit_user' } do |f|
   .fields-row
     .fields-group.fields-row__column.fields-row__column-6
-      = f.input :locale, collection: I18n.available_locales, wrapper: :with_label, include_blank: false, label_method: lambda { |locale| human_locale(locale) }, selected: I18n.locale, hint: false
+      = f.input :locale, collection: I18n.available_locales, wrapper: :with_label, include_blank: false, label_method: lambda { |locale| native_locale_name(locale) }, selected: I18n.locale, hint: false
     .fields-group.fields-row__column.fields-row__column-6
       = f.input :setting_theme, collection: Themes.instance.names, label_method: lambda { |theme| I18n.t("themes.#{theme}", default: theme) }, wrapper: :with_label, include_blank: false, hint: false
 
diff --git a/app/views/settings/preferences/other/show.html.haml b/app/views/settings/preferences/other/show.html.haml
index 60e25fc2d14..b7ae3d2ef78 100644
--- a/app/views/settings/preferences/other/show.html.haml
+++ b/app/views/settings/preferences/other/show.html.haml
@@ -23,7 +23,7 @@
       = f.input :setting_default_privacy, collection: Status.selectable_visibilities, wrapper: :with_label, include_blank: false, label_method: lambda { |visibility| safe_join([I18n.t("statuses.visibilities.#{visibility}"), I18n.t("statuses.visibilities.#{visibility}_long")], ' - ') }, required: false, hint: false
 
     .fields-group.fields-row__column.fields-row__column-6
-      = f.input :setting_default_language, collection: [nil] + filterable_languages, wrapper: :with_label, label_method: lambda { |locale| locale.nil? ? I18n.t('statuses.default_language') : human_locale(locale) }, required: false, include_blank: false, hint: false
+      = f.input :setting_default_language, collection: [nil] + filterable_languages, wrapper: :with_label, label_method: lambda { |locale| locale.nil? ? I18n.t('statuses.default_language') : native_locale_name(locale) }, required: false, include_blank: false, hint: false
 
   .fields-group
     = f.input :setting_default_sensitive, as: :boolean, wrapper: :with_label
@@ -34,7 +34,7 @@
   %h4= t 'preferences.public_timelines'
 
   .fields-group
-    = f.input :chosen_languages, collection: filterable_languages, wrapper: :with_block_label, include_blank: false, label_method: lambda { |locale| human_locale(locale) }, required: false, as: :check_boxes, collection_wrapper_tag: 'ul', item_wrapper_tag: 'li'
+    = f.input :chosen_languages, collection: filterable_languages, wrapper: :with_block_label, include_blank: false, label_method: lambda { |locale| native_locale_name(locale) }, required: false, as: :check_boxes, collection_wrapper_tag: 'ul', item_wrapper_tag: 'li'
 
   .actions
     = f.button :button, t('generic.save_changes'), type: :submit
diff --git a/spec/helpers/languages_helper_spec.rb b/spec/helpers/languages_helper_spec.rb
index b455cee33d1..5587fc261ab 100644
--- a/spec/helpers/languages_helper_spec.rb
+++ b/spec/helpers/languages_helper_spec.rb
@@ -9,9 +9,15 @@ describe LanguagesHelper do
     end
   end
 
-  describe 'human_locale' do
-    it 'finds the human readable local description from a key' do
-      expect(helper.human_locale(:en)).to eq('English')
+  describe 'native_locale_name' do
+    it 'finds the human readable native name from a key' do
+      expect(helper.native_locale_name(:en)).to eq('English')
+    end
+  end
+
+  describe 'standard_locale_name' do
+    it 'finds the human readable standard name from a key' do
+      expect(helper.standard_locale_name(:de)).to eq('German')
     end
   end
 end