diff --git a/config/environments/preproduction.rb b/config/environments/preproduction.rb
index 39c060f13..17103a67c 100644
--- a/config/environments/preproduction.rb
+++ b/config/environments/preproduction.rb
@@ -78,9 +78,9 @@ Rails.application.configure do
     config.action_mailer.smtp_settings = Rails.application.secrets.smtp_settings
   end
 
-  # Enable locale fallbacks for I18n (makes lookups for any locale fall back to
-  # the I18n.default_locale when a translation cannot be found).
-  config.i18n.fallbacks = true
+  # Disable locale fallbacks for I18n
+  # (prevents using fallback locales set in application.rb).
+  # config.i18n.fallbacks = false
 
   # Send deprecation notices to registered listeners.
   config.active_support.deprecation = :notify
diff --git a/config/environments/production.rb b/config/environments/production.rb
index 707331124..e0c2d5a75 100644
--- a/config/environments/production.rb
+++ b/config/environments/production.rb
@@ -79,9 +79,9 @@ Rails.application.configure do
     config.action_mailer.smtp_settings = Rails.application.secrets.smtp_settings
   end
 
-  # Enable locale fallbacks for I18n (makes lookups for any locale fall back to
-  # the I18n.default_locale when a translation cannot be found).
-  config.i18n.fallbacks = true
+  # Disable locale fallbacks for I18n
+  # (prevents using fallback locales set in application.rb).
+  # config.i18n.fallbacks = false
 
   # Send deprecation notices to registered listeners.
   config.active_support.deprecation = :notify
diff --git a/config/environments/staging.rb b/config/environments/staging.rb
index f47529f64..ec77bac43 100644
--- a/config/environments/staging.rb
+++ b/config/environments/staging.rb
@@ -78,9 +78,9 @@ Rails.application.configure do
     config.action_mailer.smtp_settings = Rails.application.secrets.smtp_settings
   end
 
-  # Enable locale fallbacks for I18n (makes lookups for any locale fall back to
-  # the I18n.default_locale when a translation cannot be found).
-  config.i18n.fallbacks = true
+  # Disable locale fallbacks for I18n
+  # (prevents using fallback locales set in application.rb).
+  # config.i18n.fallbacks = false
 
   # Send deprecation notices to registered listeners.
   config.active_support.deprecation = :notify