diff --git a/app/controllers/application_controller.rb b/app/controllers/application_controller.rb
index 79fc7d73..e80c279d 100644
--- a/app/controllers/application_controller.rb
+++ b/app/controllers/application_controller.rb
@@ -46,17 +46,19 @@ class ApplicationController < ActionController::Base
   # defecto.
   #
   # Esto se refiere al idioma de la interfaz, no de los artículos.
-  def current_locale(include_params: true, site: nil)
-    return params[:locale] if include_params && params[:locale].present?
+  #
+  # @return [String,Symbol]
+  def current_locale
+    session[:locale] = params[:change_locale_to] if params[:change_locale_to].present?
 
-    current_usuarie&.lang || I18n.locale
+    session[:locale] || current_usuarie&.lang || I18n.locale
   end
 
   # El idioma es el preferido por le usuarie, pero no necesariamente se
   # corresponde con el idioma de los artículos, porque puede querer
   # traducirlos.
   def set_locale(&action)
-    I18n.with_locale(current_locale(include_params: params[:controller].start_with?('devise')), &action)
+    I18n.with_locale(current_locale, &action)
   end
 
   # Muestra una página 404
@@ -88,4 +90,12 @@ class ApplicationController < ActionController::Base
   def prepare_exception_notifier
     request.env['exception_notifier.exception_data'] = { usuarie: current_usuarie }
   end
+
+  # Olvidar el idioma elegido antes de iniciar la sesión y reenviar a
+  # los sitios en el idioma de le usuarie.
+  def after_sign_in_path_for(resource)
+    session[:locale] = nil
+
+    sites_path
+  end
 end
diff --git a/app/views/devise/mailer/confirmation_instructions.html.haml b/app/views/devise/mailer/confirmation_instructions.html.haml
index 46706c40..76b10d7f 100644
--- a/app/views/devise/mailer/confirmation_instructions.html.haml
+++ b/app/views/devise/mailer/confirmation_instructions.html.haml
@@ -1,3 +1,3 @@
 %p= t('.greeting', recipient: @email)
 %p= t('.instruction')
-%p= link_to t('.action'), confirmation_url(@resource, confirmation_token: @token)
+%p= link_to t('.action'), confirmation_url(@resource, confirmation_token: @token, change_locale_to: @resource.lang)
diff --git a/app/views/devise/mailer/confirmation_instructions.text.haml b/app/views/devise/mailer/confirmation_instructions.text.haml
index 38e4c548..7123a738 100644
--- a/app/views/devise/mailer/confirmation_instructions.text.haml
+++ b/app/views/devise/mailer/confirmation_instructions.text.haml
@@ -2,4 +2,4 @@
 \
 = t('.instruction')
 \
-= confirmation_url(@resource, confirmation_token: @token)
+= confirmation_url(@resource, confirmation_token: @token, change_locale_to: @resource.lang)
diff --git a/app/views/devise/mailer/invitation_instructions.html.haml b/app/views/devise/mailer/invitation_instructions.html.haml
index 74193878..a2434abd 100644
--- a/app/views/devise/mailer/invitation_instructions.html.haml
+++ b/app/views/devise/mailer/invitation_instructions.html.haml
@@ -9,7 +9,7 @@
 %p= site.description
 
 %p= link_to t('devise.mailer.invitation_instructions.accept'),
-  accept_invitation_url(@resource, invitation_token: @token)
+  accept_invitation_url(@resource, invitation_token: @token, change_locale_to: @resource.lang)
 
 - if @resource.invitation_due_at
   %p= t('devise.mailer.invitation_instructions.accept_until',
diff --git a/app/views/devise/mailer/invitation_instructions.text.haml b/app/views/devise/mailer/invitation_instructions.text.haml
index 16a9f0a8..27b1580c 100644
--- a/app/views/devise/mailer/invitation_instructions.text.haml
+++ b/app/views/devise/mailer/invitation_instructions.text.haml
@@ -9,7 +9,7 @@
 \
 = site.description
 \
-= accept_invitation_url(@resource, invitation_token: @token)
+= accept_invitation_url(@resource, invitation_token: @token, change_locale_to: @resource.lang)
 \
 - if @resource.invitation_due_at
   = t('devise.mailer.invitation_instructions.accept_until',
diff --git a/app/views/devise/mailer/reset_password_instructions.html.haml b/app/views/devise/mailer/reset_password_instructions.html.haml
index ccc4aa55..8d8f5919 100644
--- a/app/views/devise/mailer/reset_password_instructions.html.haml
+++ b/app/views/devise/mailer/reset_password_instructions.html.haml
@@ -1,5 +1,5 @@
 %p= t('.greeting', recipient: @resource.email)
 %p= t('.instruction')
-%p= link_to t('.action'), edit_password_url(@resource, reset_password_token: @token)
+%p= link_to t('.action'), edit_password_url(@resource, reset_password_token: @token, change_locale_to: @resource.lang)
 %p= t('.instruction_2')
 %p= t('.instruction_3')
diff --git a/app/views/devise/mailer/reset_password_instructions.text.haml b/app/views/devise/mailer/reset_password_instructions.text.haml
index 3d0fe64d..923c2a0c 100644
--- a/app/views/devise/mailer/reset_password_instructions.text.haml
+++ b/app/views/devise/mailer/reset_password_instructions.text.haml
@@ -2,7 +2,7 @@
 \
 = t('.instruction')
 \
-= edit_password_url(@resource, reset_password_token: @token)
+= edit_password_url(@resource, reset_password_token: @token, change_locale_to: @resource.lang)
 \
 = t('.instruction_2')
 \
diff --git a/app/views/devise/mailer/unlock_instructions.html.haml b/app/views/devise/mailer/unlock_instructions.html.haml
index d68bf7c7..9f8cd492 100644
--- a/app/views/devise/mailer/unlock_instructions.html.haml
+++ b/app/views/devise/mailer/unlock_instructions.html.haml
@@ -1,4 +1,4 @@
 %p= t('.greeting', recipient: @resource.email)
 %p= t('.message')
 %p= t('.instruction')
-%p= link_to t('.action'), unlock_url(@resource, unlock_token: @token)
+%p= link_to t('.action'), unlock_url(@resource, unlock_token: @token, change_locale_to: @resource.lang)
diff --git a/app/views/devise/mailer/unlock_instructions.text.haml b/app/views/devise/mailer/unlock_instructions.text.haml
index cf06927b..950e04b7 100644
--- a/app/views/devise/mailer/unlock_instructions.text.haml
+++ b/app/views/devise/mailer/unlock_instructions.text.haml
@@ -4,4 +4,4 @@
 \
 = t('.instruction')
 \
-= unlock_url(@resource, unlock_token: @token)
+= unlock_url(@resource, unlock_token: @token, change_locale_to: @resource.lang)
diff --git a/app/views/devise/shared/_links.haml b/app/views/devise/shared/_links.haml
index c8a6c041..b4b89175 100644
--- a/app/views/devise/shared/_links.haml
+++ b/app/views/devise/shared/_links.haml
@@ -3,7 +3,8 @@
 - locale = params.permit(:locale)
 
 - if controller_name != 'sessions'
-  = link_to t('.sign_in'), new_session_path(resource_name, params: locale)
+  = link_to t('.sign_in'), new_session_path(resource_name, params: locale),
+    class: 'btn btn-lg btn-block btn-success'
   %br/
 
 - if devise_mapping.registerable? && controller_name != 'registrations'
diff --git a/app/views/layouts/_breadcrumb.haml b/app/views/layouts/_breadcrumb.haml
index 131c3281..099ddde4 100644
--- a/app/views/layouts/_breadcrumb.haml
+++ b/app/views/layouts/_breadcrumb.haml
@@ -23,5 +23,6 @@
         = link_to t('.logout'), main_app.destroy_usuarie_session_path,
           method: :delete, role: 'button', class: 'btn'
   - else
-    - other_locale = I18n.available_locales.find { |locale| locale != I18n.locale }
-    = link_to t(other_locale), "?locale=#{other_locale}"
+    - I18n.available_locales.each do |locale|
+      - next if locale == I18n.locale
+      = link_to t(locale), "?change_locale_to=#{locale}"