Fix missing localization of inactive user removal warning emails.

Fixes #5950

Changelog.md

@@ -25,6 +25,7 @@
 * Update the configurate gem to avoid issues by missed missing settings keys [#5934](https://github.com/diaspora/diaspora/pull/5934)
 * ContactPresenter#full_hash_with_person did not contain relationship information [#5936](https://github.com/diaspora/diaspora/pull/5936)
 * Fix inactive user removal not respecting configuration for daily limits [#5953](https://github.com/diaspora/diaspora/pull/5953)
+* Fix missing localization of inactive user removal warning emails [#5950](https://github.com/diaspora/diaspora/issues/5950)
 
 ## Features
 * Hide post title of limited post in comment notification email [#5843](https://github.com/diaspora/diaspora/pull/5843)

app/mailers/maintenance.rb

@@ -7,9 +7,12 @@ class Maintenance < ActionMailer::Base
     @pod_url = AppConfig.environment.url
     @after_days = AppConfig.settings.maintenance.remove_old_users.after_days.to_s
     @remove_after = @user.remove_after
-    mail(:to => @user.email, :subject => I18n.t('notifier.remove_old_user.subject')) do |format|
-      format.text
-      format.html
+
+    I18n.with_locale(@user.language) do
+      mail(to: @user.email, subject: I18n.t("notifier.remove_old_user.subject")) do |format|
+        format.text
+        format.html
+      end
     end
   end
 end