diff --git a/.env.production.sample b/.env.production.sample
index a7f9eb4b..44ca984b 100644
--- a/.env.production.sample
+++ b/.env.production.sample
@@ -25,6 +25,9 @@ OTP_SECRET=
 # Only allow registrations with the following e-mail domains
 # EMAIL_DOMAIN_WHITELIST=example1.com|example2.de|etc
 
+# Optionally change default language
+# DEFAULT_LOCALE=de
+
 # E-mail configuration
 SMTP_SERVER=smtp.mailgun.org
 SMTP_PORT=587
@@ -44,6 +47,16 @@ SMTP_FROM_ADDRESS=notifications@example.com
 # S3_PROTOCOL=http
 # S3_HOSTNAME=192.168.1.123:9000
 
+# S3 (Minio Config (optional) Please check Minio instance for details)
+# S3_ENABLED=true
+# S3_BUCKET=
+# AWS_ACCESS_KEY_ID=
+# AWS_SECRET_ACCESS_KEY=
+# S3_REGION=
+# S3_PROTOCOL=https
+# S3_HOSTNAME=
+# S3_ENDPOINT=
+
 # Optional alias for S3 if you want to use Cloudfront or Cloudflare in front
 # S3_CLOUDFRONT_HOST=
 
diff --git a/app/controllers/application_controller.rb b/app/controllers/application_controller.rb
index c06142fd..f00f9c1e 100644
--- a/app/controllers/application_controller.rb
+++ b/app/controllers/application_controller.rb
@@ -1,6 +1,8 @@
 # frozen_string_literal: true
 
 class ApplicationController < ActionController::Base
+  include Localized
+
   # Prevent CSRF attacks by raising an exception.
   # For APIs, you may want to use :null_session instead.
   protect_from_forgery with: :exception
@@ -14,7 +16,6 @@ class ApplicationController < ActionController::Base
   rescue_from ActionController::InvalidAuthenticityToken, with: :unprocessable_entity
 
   before_action :store_current_location, except: :raise_not_found, unless: :devise_controller?
-  before_action :set_locale
   before_action :set_user_activity
   before_action :check_suspension, if: :user_signed_in?
 
@@ -28,12 +29,6 @@ class ApplicationController < ActionController::Base
     store_location_for(:user, request.url)
   end
 
-  def set_locale
-    I18n.locale = current_user.try(:locale) || I18n.default_locale
-  rescue I18n::InvalidLocale
-    I18n.locale = I18n.default_locale
-  end
-
   def require_admin!
     redirect_to root_path unless current_user&.admin?
   end
diff --git a/app/controllers/concerns/localized.rb b/app/controllers/concerns/localized.rb
new file mode 100644
index 00000000..b6f86809
--- /dev/null
+++ b/app/controllers/concerns/localized.rb
@@ -0,0 +1,19 @@
+# frozen_string_literal: true
+
+module Localized
+  extend ActiveSupport::Concern
+
+  included do
+    before_action :set_locale
+  end
+
+  def set_locale
+    I18n.locale = current_user.try(:locale) || default_locale
+  rescue I18n::InvalidLocale
+    I18n.locale = default_locale
+  end
+
+  def default_locale
+    ENV.fetch('DEFAULT_LOCALE') { I18n.default_locale }
+  end
+end
diff --git a/app/controllers/oauth/authorizations_controller.rb b/app/controllers/oauth/authorizations_controller.rb
index 7c25266d..cdbfde0f 100644
--- a/app/controllers/oauth/authorizations_controller.rb
+++ b/app/controllers/oauth/authorizations_controller.rb
@@ -1,9 +1,10 @@
 # frozen_string_literal: true
 
 class Oauth::AuthorizationsController < Doorkeeper::AuthorizationsController
+  include Localized
+
   skip_before_action :authenticate_resource_owner!
 
-  before_action :set_locale
   before_action :store_current_location
   before_action :authenticate_resource_owner!
 
@@ -12,10 +13,4 @@ class Oauth::AuthorizationsController < Doorkeeper::AuthorizationsController
   def store_current_location
     store_location_for(:user, request.url)
   end
-
-  def set_locale
-    I18n.locale = current_user.try(:locale) || I18n.default_locale
-  rescue I18n::InvalidLocale
-    I18n.locale = I18n.default_locale
-  end
 end
diff --git a/app/controllers/oauth/authorized_applications_controller.rb b/app/controllers/oauth/authorized_applications_controller.rb
new file mode 100644
index 00000000..09dd5d3c
--- /dev/null
+++ b/app/controllers/oauth/authorized_applications_controller.rb
@@ -0,0 +1,16 @@
+# frozen_string_literal: true
+
+class Oauth::AuthorizedApplicationsController < Doorkeeper::AuthorizedApplicationsController
+  include Localized
+
+  skip_before_action :authenticate_resource_owner!
+
+  before_action :store_current_location
+  before_action :authenticate_resource_owner!
+
+  private
+
+  def store_current_location
+    store_location_for(:user, request.url)
+  end
+end
diff --git a/app/lib/atom_serializer.rb b/app/lib/atom_serializer.rb
index 4ce0f451..be1cced8 100644
--- a/app/lib/atom_serializer.rb
+++ b/app/lib/atom_serializer.rb
@@ -101,7 +101,7 @@ class AtomSerializer
     serialize_status_attributes(object, status)
 
     append_element(object, 'link', nil, rel: :alternate, type: 'text/html', href: TagManager.instance.url_for(status))
-    append_element(object, 'thr:in-reply-to', nil, ref: TagManager.instance.uri_for(status.thread), href: TagManager.instance.url_for(status.thread)) if status.reply?
+    append_element(object, 'thr:in-reply-to', nil, ref: TagManager.instance.uri_for(status.thread), href: TagManager.instance.url_for(status.thread)) if status.reply? && !status.thread.nil?
 
     object
   end
diff --git a/app/views/doorkeeper/authorized_applications/index.html.haml b/app/views/oauth/authorized_applications/index.html.haml
similarity index 100%
rename from app/views/doorkeeper/authorized_applications/index.html.haml
rename to app/views/oauth/authorized_applications/index.html.haml
diff --git a/app/views/user_mailer/confirmation_instructions.fi.html.erb b/app/views/user_mailer/confirmation_instructions.fi.html.erb
new file mode 100644
index 00000000..8b72722d
--- /dev/null
+++ b/app/views/user_mailer/confirmation_instructions.fi.html.erb
@@ -0,0 +1,5 @@
+<p>Tervetuloa <%= @resource.email %>!</p>
+
+<p>Voit vahvistaa Mastodon tilisi klikkaamalla alla olevaa linkkiä:</p>
+
+<p><%= link_to 'Varmista tilini', confirmation_url(@resource, confirmation_token: @token) %></p>
diff --git a/app/views/user_mailer/confirmation_instructions.fi.text.erb b/app/views/user_mailer/confirmation_instructions.fi.text.erb
new file mode 100644
index 00000000..796913ab
--- /dev/null
+++ b/app/views/user_mailer/confirmation_instructions.fi.text.erb
@@ -0,0 +1,5 @@
+Tervetuloa <%= @resource.email %>!
+
+Voit vahvistaa Mastodon tilisi klikkaamalla alla olevaa linkkiä:
+
+<%= confirmation_url(@resource, confirmation_token: @token) %>
diff --git a/app/views/user_mailer/password_change.fi.html.erb b/app/views/user_mailer/password_change.fi.html.erb
new file mode 100644
index 00000000..c56b9659
--- /dev/null
+++ b/app/views/user_mailer/password_change.fi.html.erb
@@ -0,0 +1,3 @@
+<p>Hei <%= @resource.email %>!</p>
+
+<p>Lähetämme tämän viestin ilmoittaaksemme että salasanasi on vaihdettu.</p>
diff --git a/app/views/user_mailer/password_change.fi.text.erb b/app/views/user_mailer/password_change.fi.text.erb
new file mode 100644
index 00000000..d90c3fde
--- /dev/null
+++ b/app/views/user_mailer/password_change.fi.text.erb
@@ -0,0 +1,3 @@
+Hei <%= @resource.email %>!
+
+Lähetämme tämän viestin ilmoittaaksemme että salasanasi on vaihdettu.
diff --git a/app/views/user_mailer/reset_password_instructions.fi.html.erb b/app/views/user_mailer/reset_password_instructions.fi.html.erb
new file mode 100644
index 00000000..53be0b62
--- /dev/null
+++ b/app/views/user_mailer/reset_password_instructions.fi.html.erb
@@ -0,0 +1,8 @@
+<p>Hei <%= @resource.email %>!</p>
+
+<p>Joku on pyytänyt salasanvaihto Mastodonissa. Voit tehdä sen allaolevassa linkissä.</p>
+
+<p><%= link_to 'Vaihda salasanani', edit_password_url(@resource, reset_password_token: @token) %></p>
+
+<p>Jos et pyytänyt vaihtoa, poista tämä viesti.</p>
+<p>Salasanaasi ei vaihdeta ennen kuin menet ylläolevaan linkkiin ja luot uuden.</p>
diff --git a/app/views/user_mailer/reset_password_instructions.fi.text.erb b/app/views/user_mailer/reset_password_instructions.fi.text.erb
new file mode 100644
index 00000000..c826d5fc
--- /dev/null
+++ b/app/views/user_mailer/reset_password_instructions.fi.text.erb
@@ -0,0 +1,8 @@
+Hei <%= @resource.email %>!
+
+Joku on pyytänyt salasanvaihto Mastodonissa. Voit tehdä sen allaolevassa linkissä.
+
+<%= edit_password_url(@resource, reset_password_token: @token) %>
+
+Jos et pyytänyt vaihtoa, poista tämä viesti.
+Salasanaasi ei vaihdeta ennen kuin menet ylläolevaan linkkiin ja luot uuden.
diff --git a/config/locales/fi.yml b/config/locales/fi.yml
index cdb2b988..947d3f64 100644
--- a/config/locales/fi.yml
+++ b/config/locales/fi.yml
@@ -16,18 +16,18 @@ fi:
       chronology: Aikajana on kronologisessa järjestyksessä
       ethics: 'Eettinen suunnittelu: ei mainoksia, no seurantaa'
       gifv: GIFV settejä ja lyhyitä videoita
-      privacy: Julkaisu kohtainen yksityisyys aseuts
+      privacy: Julkaisu kohtainen yksityisyys asetus
       public: Julkiset aikajanat
     features_headline: Mikä erottaa Mastodonin muista
     get_started: Aloita käyttö
     links: Linkit
-    other_instances: muuhun palvelimeen
+    other_instances: Muut palvelimet
     source_code: Lähdekoodi
     status_count_after: statusta
     status_count_before: Ovat luoneet
     terms: Ehdot
-    user_count_after: käyttäjää
-    user_count_before: Koti käyttäjälle
+    user_count_after: käyttäjälle
+    user_count_before: Koti
   accounts:
     follow: Seuraa
     followers: Seuraajat
@@ -130,8 +130,8 @@ fi:
     authorized_apps: Valtuutetut ohjelmat
     back: Takaisin Mastodoniin
     edit_profile: Muokkaa profiilia
-    export: Datan vienti
-    import: Datan tuonti
+    export: Vie dataa
+    import: Tuo dataa
     preferences: Ominaisuudet
     settings: Asetukset
     two_factor_auth: Kaksivaiheinen tunnistus
diff --git a/config/routes.rb b/config/routes.rb
index ca77191f..315ad5da 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -11,7 +11,7 @@ Rails.application.routes.draw do
   end
 
   use_doorkeeper do
-    controllers authorizations: 'oauth/authorizations'
+    controllers authorizations: 'oauth/authorizations', authorized_applications: 'oauth/authorized_applications'
   end
 
   get '.well-known/host-meta', to: 'xrd#host_meta', as: :host_meta
diff --git a/docs/Using-Mastodon/FAQ.md b/docs/Using-Mastodon/FAQ.md
index daedcbdd..3b03a8ee 100644
--- a/docs/Using-Mastodon/FAQ.md
+++ b/docs/Using-Mastodon/FAQ.md
@@ -36,8 +36,9 @@ While Mastodon is compatible with GNU social in terms of server to server commun
 
 Because Mastodon has been created from a blank slate, it is much simpler to have the API mirror internal structures as closely as possible, rather than build an emulation layer. Secondly, the GNU social client API is actually a half-way implementation of the legacy Twitter API - that's the reason why it works with some older Twitter client apps. However, many of those apps are not maintained anymore, the GNU social API does not actually keep up with the real Twitter API and never fully implemented all its features; at the same time, the Twitter API was never meant for a federated service and so obscures some of the functionality.
 
+
 #### How is Mastodon funded?
 
 Development of Mastodon and hosting of mastodon.social is funded through my [Patreon (also BTC/PayPal donations)](https://www.patreon.com/user?u=619786). Beyond that, I am not interested in VC funding, monetizing, advertising, or anything of that sort. I could offer setup/maintenance services on demand.
 
-The software is free and open source and communities should host their own servers if they can, that way the costs are more or less distributed. Obviously it'd be hard for me to pay the bills if literally everyone decided to use the mastodon.social instance only.
\ No newline at end of file
+The software is free and open source and communities should host their own servers if they can, that way the costs are more or less distributed. Obviously it'd be hard for me to pay the bills if literally everyone decided to use the mastodon.social instance only.