diff --git a/app/views/settings/preferences/appearance/show.html.haml b/app/views/settings/preferences/appearance/show.html.haml
index 9ed83fb93..d2b05513e 100644
--- a/app/views/settings/preferences/appearance/show.html.haml
+++ b/app/views/settings/preferences/appearance/show.html.haml
@@ -8,6 +8,10 @@
     .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
 
+  - unless I18n.locale == :en
+    .flash-message{ style: "text-align: unset; color: unset" }
+      #{t 'appearance.localization.body'} #{content_tag(:a, t('appearance.localization.guide_link_text'), href: t('appearance.localization.guide_link'), target: "_blank", rel: "noopener", style: "text-decoration: underline")}
+
   %h4= t 'appearance.advanced_web_interface'
 
   %p.hint= t 'appearance.advanced_web_interface_hint'
diff --git a/config/locales/en.yml b/config/locales/en.yml
index c7179d304..42bd81e40 100644
--- a/config/locales/en.yml
+++ b/config/locales/en.yml
@@ -581,6 +581,10 @@ en:
     animations_and_accessibility: Animations and accessibility
     confirmation_dialogs: Confirmation dialogs
     discovery: Discovery
+    localization:
+      body: Mastodon is translated by volunteers.
+      guide_link: https://crowdin.com/project/mastodon
+      guide_link_text: Everyone can contribute.
     sensitive_content: Sensitive content
     toot_layout: Toot layout
   application_mailer: