diff --git a/app/controllers/application_controller.rb b/app/controllers/application_controller.rb
index 16aa80fa..30e0a488 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
+  BROWSER_LOCALE_REGEXP = /\A\w{2}(?:-\w{2})?/
+
   include ActiveStorage::SetCurrent
   include Pagy::Backend
 
@@ -32,6 +34,21 @@ class ApplicationController < ActionController::Base
 
   private
 
+  def with_browser_locale(&)
+    locale = request.env['HTTP_ACCEPT_LANGUAGE'].to_s[BROWSER_LOCALE_REGEXP].to_s
+
+    locale =
+      if locale.starts_with?('en-') && locale != 'en-US'
+        'en-GB'
+      else
+        locale.split('-').first.presence || 'en-GB'
+      end
+
+    locale = 'en-GB' unless I18n.locale_available?(locale)
+
+    I18n.with_locale(locale, &)
+  end
+
   def sign_in_for_demo
     sign_in(User.active.order('random()').take) unless signed_in?
   end
diff --git a/app/controllers/start_form_controller.rb b/app/controllers/start_form_controller.rb
index bad00328..d19c69b1 100644
--- a/app/controllers/start_form_controller.rb
+++ b/app/controllers/start_form_controller.rb
@@ -6,6 +6,7 @@ class StartFormController < ApplicationController
   skip_before_action :authenticate_user!
   skip_authorization_check
 
+  around_action :with_browser_locale, only: %i[show completed]
   before_action :load_template
 
   def show
diff --git a/app/controllers/submit_form_controller.rb b/app/controllers/submit_form_controller.rb
index a9ae111b..1564cfc6 100644
--- a/app/controllers/submit_form_controller.rb
+++ b/app/controllers/submit_form_controller.rb
@@ -3,6 +3,7 @@
 class SubmitFormController < ApplicationController
   layout 'form'
 
+  around_action :with_browser_locale, only: %i[show completed]
   skip_before_action :authenticate_user!
   skip_authorization_check
 
diff --git a/app/javascript/submission_form/i18n.js b/app/javascript/submission_form/i18n.js
index 83c16850..19b94434 100644
--- a/app/javascript/submission_form/i18n.js
+++ b/app/javascript/submission_form/i18n.js
@@ -453,7 +453,7 @@ const he = {
   use_international_format: 'השתמש בפורמט בינלאומי: +1xxx',
   six_digits_code: 'קוד משתמש שש ספרות',
   change_phone_number: 'שינוי מספר טלפון',
-  sending: 'שולח...',
+  sending: 'שולח',
   resend_code: 'שלח מחדש קוד',
   verification_code_has_been_resent: 'קוד האימות נשלח מחדש בSMS',
   please_fill_all_required_fields: 'אנא מלא את כל השדות הדרושים',
diff --git a/app/views/start_form/completed.html.erb b/app/views/start_form/completed.html.erb
index 145f2ba1..e78bc48f 100644
--- a/app/views/start_form/completed.html.erb
+++ b/app/views/start_form/completed.html.erb
@@ -10,23 +10,23 @@
             <%= svg_icon('writing_sign', class: 'w-10 h-10') %>
           </div>
           <div>
-            <p class="text-lg font-bold mb-1"><%= @submitter.submission.template.name %></p>
-            <p class="text-sm">Signed on <%= l(@submitter.completed_at.to_date, format: :long, locale: @submitter.submission.template.account.locale) %></p>
+            <p dir="auto" class="text-lg font-bold mb-1"><%= @submitter.submission.template.name %></p>
+            <p dir="auto" class="text-sm"><%= t('signed_on_time', time: l(@submitter.completed_at.to_date, format: :long)) %></p>
           </div>
         </div>
       </div>
     </div>
-    <div class="text-center text-2xl font-semibold">
-      Form has been submitted already
+    <div dir="auto" class="text-center text-2xl font-semibold">
+      <%= t('form_has_been_submitted_already') %>
     </div>
     <% if Accounts.can_send_emails?(@submitter.submission.template.account) %>
       <div>
-        <%= button_to button_title(title: 'Send copy to Email', disabled_with: 'Sending', icon: svg_icon('mail_forward', class: 'w-6 h-6')), send_submission_email_index_path, params: { submitter_slug: @submitter.slug }, form: { onsubmit: 'event.submitter.disabled = true' }, class: 'base-button w-full' %>
+        <%= button_to button_title(title: t('send_copy_to_email'), disabled_with: t('sending'), icon: svg_icon('mail_forward', class: 'w-6 h-6')), send_submission_email_index_path, params: { submitter_slug: @submitter.slug }, form: { onsubmit: 'event.submitter.disabled = true' }, class: 'base-button w-full' %>
       </div>
     <% end %>
     <% if @template.submitters.to_a.size == 1 %>
       <div>
-        <%= button_to button_title(title: 'Resubmit', disabled_with: 'Resubmit', icon: svg_icon('reload', class: 'w-6 h-6')), start_form_path(@template.slug), params: { submitter: { email: params[:email] }, resubmit: @submitter.slug }, method: :put, form: { onsubmit: 'event.submitter.disabled = true' }, class: 'white-button w-full' %>
+        <%= button_to button_title(title: t('resubmit'), disabled_with: t('resubmit'), icon: svg_icon('reload', class: 'w-6 h-6')), start_form_path(@template.slug), params: { submitter: { email: params[:email] }, resubmit: @submitter.slug }, method: :put, form: { onsubmit: 'event.submitter.disabled = true' }, class: 'white-button w-full' %>
       </div>
     <% end %>
   </div>
diff --git a/app/views/start_form/show.html.erb b/app/views/start_form/show.html.erb
index a9a505cb..cb46e97f 100644
--- a/app/views/start_form/show.html.erb
+++ b/app/views/start_form/show.html.erb
@@ -4,7 +4,7 @@
       <div class="text-center w-full space-y-6">
         <%= render 'banner' %>
         <% unless @template.archived_at? %>
-          <p class="text-xl font-semibold text-center">You have been invited to submit a form</p>
+          <p class="text-xl font-semibold text-center"><%= t('you_have_been_invited_to_submit_a_form') %></p>
         <% end %>
       </div>
       <div class="flex items-center bg-base-200 rounded-xl p-4 mb-4">
@@ -15,9 +15,9 @@
           <div>
             <p class="text-lg font-bold mb-1"><%= @template.name %></p>
             <% if @template.archived_at? %>
-              <p class="text-sm">Form has been deleted by <span class="font-semibold"><%= @template.account.name %></span>.</p>
+              <p dir="auto" class="text-sm"><%= t('form_has_been_deleted_by_html', name: @template.account.name) %></p>
             <% else %>
-              <p class="text-sm">Invited by <span class="font-semibold"><%= @template.account.name %></span></p>
+              <p dir="auto" class="text-sm"><%= t('invited_by_html', name: @template.account.name) %></p>
             <% end %>
           </div>
         </div>
@@ -25,13 +25,13 @@
     </div>
     <% unless @template.archived_at? %>
       <%= form_for @submitter, url: start_form_path(@template.slug), data: { turbo_frame: :_top }, method: :put, html: { class: 'space-y-4', onsubmit: 'event.submitter.disabled = true' } do |f| %>
-        <div class="form-control !mt-0">
-          <%= f.label :email, class: 'label' %>
-          <%= f.email_field :email, value: current_user&.email || params[:email] || @submitter.email, required: true, class: 'base-input', placeholder: 'Provide your email to start' %>
+        <div dir="auto" class="form-control !mt-0">
+          <%= f.label :email, t('email'), class: 'label' %>
+          <%= f.email_field :email, value: current_user&.email || params[:email] || @submitter.email, required: true, class: 'base-input', placeholder: t('provide_your_email_to_start') %>
           <%= @error_message %>
         </div>
-        <div class="form-control">
-          <%= f.button button_title(title: 'Start', disabled_with: 'Starting'), class: 'base-button' %>
+        <div dir="auto" class="form-control">
+          <%= f.button button_title(title: t('start'), disabled_with: t('starting')), class: 'base-button' %>
         </div>
       <% end %>
     <% end %>
diff --git a/app/views/submit_form/archived.html.erb b/app/views/submit_form/archived.html.erb
index a4e6e821..dec90d96 100644
--- a/app/views/submit_form/archived.html.erb
+++ b/app/views/submit_form/archived.html.erb
@@ -9,9 +9,9 @@
           <div class="mr-3">
             <%= svg_icon('writing_sign', class: 'w-10 h-10') %>
           </div>
-          <div>
+          <div dir="auto">
             <p class="text-lg font-bold mb-1"><%= @submitter.submission.template.name %></p>
-            <p class="text-sm">Form has been deleted by <span class="font-semibold"><%= @submitter.submission.template.account.name %></span>.</p>
+            <p class="text-sm"><%= t('form_has_been_deleted_by', name: @submitter.submission.template.account.name %></p>
           </div>
         </div>
       </div>
diff --git a/app/views/submit_form/completed.html.erb b/app/views/submit_form/completed.html.erb
index 3dc8ce2c..39fd6978 100644
--- a/app/views/submit_form/completed.html.erb
+++ b/app/views/submit_form/completed.html.erb
@@ -10,17 +10,17 @@
             <%= svg_icon('writing_sign', class: 'w-10 h-10') %>
           </div>
           <div>
-            <p class="text-lg font-bold mb-1"><%= @submitter.submission.template.name %></p>
-            <p class="text-sm">Signed on <%= l(@submitter.completed_at.to_date, format: :long, locale: @submitter.submission.template.account.locale) %></p>
+            <p dir="auto" class="text-lg font-bold mb-1"><%= @submitter.submission.template.name %></p>
+            <p dir="auto" class="text-sm"><%= t('signed_on_time', time: l(@submitter.completed_at.to_date, format: :long)) %></p>
           </div>
         </div>
       </div>
     </div>
     <div>
       <% if Accounts.can_send_emails?(@submitter.submission.template.account) && @submitter.email.present? %>
-        <%= button_to button_title(title: 'Send copy to Email', disabled_with: 'Sending', icon: svg_icon('mail_forward', class: 'w-6 h-6')), send_submission_email_index_path, params: { submitter_slug: @submitter.slug }, form: { onsubmit: 'event.submitter.disabled = true' }, class: 'white-button w-full' %>
+        <%= button_to button_title(title: t('send_copy_to_email'), disabled_with: t('sending'), icon: svg_icon('mail_forward', class: 'w-6 h-6')), send_submission_email_index_path, params: { submitter_slug: @submitter.slug }, form: { onsubmit: 'event.submitter.disabled = true' }, class: 'white-button w-full' %>
         <% if @submitter.submission.template.submitters.size != 1 %>
-          <div class="divider">OR</div>
+          <div class="divider uppercase"><%= t('or') %></div>
         <% else %>
           <div class="py-2"></div>
         <% end %>
@@ -28,18 +28,18 @@
       <download-button data-src="<%= submitter_download_index_path(@submitter.slug) %>" class="base-button w-full">
         <span class="flex items-center justify-center space-x-2" data-target="download-button.defaultButton">
           <%= svg_icon('download', class: 'w-6 h-6') %>
-          <span>Download documents</span>
+          <span><%= t('download_documents') %></span>
         </span>
         <span class="flex items-center justify-center space-x-2 hidden" data-target="download-button.loadingButton">
           <%= svg_icon('loader', class: 'w-6 h-6 animate-spin') %>
-          <span>Downloading</span>
+          <span><%= t('downloading') %></span>
         </span>
       </download-button>
     </div>
     <% if @submitter.submission.template.submitters.size == 1 %>
-      <div class="divider">OR</div>
+      <div class="divider uppercase"><%= t('or') %></div>
       <div>
-        <%= button_to button_title(title: 'Resubmit', disabled_with: 'Resubmit', icon: svg_icon('reload', class: 'w-6 h-6')), start_form_path(@submitter.submission.template.slug), params: { submitter: { email: @submitter.email, phone: @submitter.phone, name: @submitter.name }, resubmit: @submitter.slug }, method: :put, form: { onsubmit: 'event.submitter.disabled = true' }, class: 'white-button w-full' %>
+        <%= button_to button_title(title: t('resubmit'), disabled_with: t('resubmit'), icon: svg_icon('reload', class: 'w-6 h-6')), start_form_path(@submitter.submission.template.slug), params: { submitter: { email: @submitter.email, phone: @submitter.phone, name: @submitter.name }, resubmit: @submitter.slug }, method: :put, form: { onsubmit: 'event.submitter.disabled = true' }, class: 'white-button w-full' %>
       </div>
     <% end %>
   </div>
diff --git a/config/application.rb b/config/application.rb
index b48291c7..01bd3d68 100644
--- a/config/application.rb
+++ b/config/application.rb
@@ -22,7 +22,7 @@ module DocuSeal
 
     config.active_storage.routes_prefix = ''
 
-    config.i18n.available_locales = %i[en en-US en-GB es-ES fr-FR pt-PT de-DE pt]
+    config.i18n.available_locales = %i[en en-US en-GB es-ES fr-FR pt-PT de-DE es it de fr pl uk cs pt he]
     config.i18n.fallbacks = [:en]
 
     config.exceptions_app = ->(env) { ErrorsController.action(:show).call(env) }
diff --git a/config/environments/development.rb b/config/environments/development.rb
index 127c1417..90bcaa3c 100644
--- a/config/environments/development.rb
+++ b/config/environments/development.rb
@@ -82,7 +82,7 @@ Rails.application.configure do
   ActiveRecord::Encryption.configure(**config.active_record.encryption)
 
   # Raises error for missing translations.
-  # config.i18n.raise_on_missing_translations = true
+  config.i18n.raise_on_missing_translations = true
 
   # Annotate rendered view with file names.
   # config.action_view.annotate_rendered_view_with_filenames = true
diff --git a/config/locales/en.yml b/config/locales/en.yml
index e8d944c9..4d03c9f6 100644
--- a/config/locales/en.yml
+++ b/config/locales/en.yml
@@ -1,29 +1,222 @@
-en-US:
+en: &en
+  email: Email
   digitally_signed_by: Digitally signed by
   role: Role
+  provide_your_email_to_start: Provide your email to start
+  start: Start
+  starting: Starting
+  form_has_been_deleted_by_html: 'Form has been deleted by <span class="font-semibold">%{name}</span>.'
+  invited_by_html: 'Invited by <span class="font-semibold">%{name}</span>'
+  you_have_been_invited_to_submit_a_form: You have been invited to submit a form
+  signed_on_time: 'Signed on %{time}'
+  form_has_been_submitted_already: Form has been submitted already
+  send_copy_to_email: Send copy to Email
+  sending: Sending
+  resubmit: Resubmit
+  form_has_been_deleted_by_html: 'Form has been deleted by <span class="font-semibold">%{name}</span>.'
+  or: or
+  download_documents: Download documents
+  downloading: Downloading
+
+es: &es
+  digitally_signed_by: Firmado digitalmente por
+  role: Rol
+  email: Correo electrónico
+  digitally_signed_by: Firmado digitalmente por
+  role: Rol
+  provide_your_email_to_start: Proporciona tu correo electrónico para comenzar
+  start: Comenzar
+  starting: Comenzando
+  form_has_been_deleted_by_html: 'El formulario ha sido eliminado por <span class="font-semibold">%{name}</span>.'
+  invited_by_html: 'Invitado por <span class="font-semibold">%{name}</span>'
+  you_have_been_invited_to_submit_a_form: Has sido invitado/a a enviar un formulario
+  signed_on_time: 'Firmado en %{time}'
+  form_has_been_submitted_already: El formulario ya ha sido enviado
+  send_copy_to_email: Enviar copia a Correo electrónico
+  sending: Enviando
+  resubmit: Reenviar
+  or: o
+  download_documents: Descargar documentos
+  downloading: Descargando
+
+it:
+  digitally_signed_by: Signé numériquement par
+  role: Rôle
+  email: Email
+  digitally_signed_by: Firmato digitalmente da
+  role: Ruolo
+  provide_your_email_to_start: Fornisci la tua email per iniziare
+  start: Inizia
+  starting: Iniziando
+  form_has_been_deleted_by_html: 'Il modulo è stato eliminato da <span class="font-semibold">%{name}</span>.'
+  invited_by_html: 'Invitato da <span class="font-semibold">%{name}</span>'
+  you_have_been_invited_to_submit_a_form: Sei stato invitato a inviare un modulo
+  signed_on_time: 'Firmato alle %{time}'
+  form_has_been_submitted_already: Il modulo è già stato inviato
+  send_copy_to_email: Invia copia via email
+  sending: Inviando
+  resubmit: Reinvia
+  or: o
+  download_documents: Scarica documenti
+  downloading: Scaricamento
+
+fr: &fr
+  email: Email
+  digitally_signed_by: Signé numériquement par
+  role: Rôle
+  provide_your_email_to_start: Entrez votre email pour commencer
+  start: Démarrer
+  starting: Démarrage
+  form_has_been_deleted_by_html: 'Le formulaire a été supprimé par <span class="font-semibold">%{name}</span>.'
+  invited_by_html: 'Invité par <span class="font-semibold">%{name}</span>'
+  you_have_been_invited_to_submit_a_form: Vous avez été invité à soumettre un formulaire
+  signed_on_time: 'Signé à %{time}'
+  form_has_been_submitted_already: Le formulaire a déjà été soumis
+  send_copy_to_email: Envoyer une copie par email
+  sending: Envoi
+  resubmit: Soumettre à nouveau
+  or: ou
+  download_documents: Télécharger des documents
+  downloading: Téléchargement
+
+pt: &pt
+  digitally_signed_by: Assinado digitalmente por
+  role: Função
+  email: Email
+  digitally_signed_by: Assinado digitalmente por
+  role: Função
+  provide_your_email_to_start: Forneça o seu email para começar
+  start: Iniciar
+  starting: Iniciando
+  form_has_been_deleted_by_html: 'O formulário foi eliminado por <span class="font-semibold">%{name}</span>.'
+  invited_by_html: 'Convidado por <span class="font-semibold">%{name}</span>'
+  you_have_been_invited_to_submit_a_form: Foi convidado a submeter um formulário
+  signed_on_time: 'Assinado em %{time}'
+  form_has_been_submitted_already: O formulário já foi submetido
+  send_copy_to_email: Enviar cópia para Email
+  sending: Enviando
+  resubmit: Reenviar
+  or: ou
+  download_documents: Baixar documentos
+  downloading: Baixando
+
+de: &de
+  digitally_signed_by: Digital signiert von
+  role: Rolle
+  email: E-Mail
+  digitally_signed_by: Digital unterzeichnet von
+  role: Rolle
+  provide_your_email_to_start: Gib deine E-Mail-Adresse ein, um zu starten
+  start: Starten
+  starting: Starten
+  form_has_been_deleted_by_html: 'Das Formular wurde von <span class="font-semibold">%{name}</span> gelöscht.'
+  invited_by_html: 'Eingeladen von <span class="font-semibold">%{name}</span>'
+  you_have_been_invited_to_submit_a_form: Du wurdest eingeladen, ein Formular einzureichen
+  signed_on_time: 'Unterzeichnet um %{time}'
+  form_has_been_submitted_already: Formular wurde bereits eingereicht
+  send_copy_to_email: Kopie per E-Mail senden
+  sending: Senden
+  resubmit: Erneut einreichen
+  or: oder
+  download_documents: Dokumente herunterladen
+  downloading: Herunterladen
+
+pl:
+  email: Email
+  digitally_signed_by: Podpis cyfrowy przez
+  role: Rola
+  provide_your_email_to_start: Podaj swój adres email, aby rozpocząć
+  start: Rozpocznij
+  starting: Rozpoczynanie
+  form_has_been_deleted_by_html: 'Formularz został usunięty przez <span class="font-semibold">%{name}</span>.'
+  invited_by_html: 'Zaproszony przez <span class="font-semibold">%{name}</span>'
+  you_have_been_invited_to_submit_a_form: Zostałeś zaproszony do przesłania formularza
+  signed_on_time: 'Podpisano %{time}'
+  form_has_been_submitted_already: Formularz został już przesłany
+  send_copy_to_email: Wyślij kopię na Email
+  sending: Wysyłanie
+  resubmit: Prześlij ponownie
+  or: lub
+  download_documents: Pobierz dokumenty
+  downloading: Pobieranie
+
+uk:
+  email: Email
+  digitally_signed_by: Цифровий підпис від
+  role: Роль
+  provide_your_email_to_start: Введіть свій email, щоб почати
+  start: Почати
+  starting: Початок
+  form_has_been_deleted_by_html: 'Форму було видалено користувачем <span class="font-semibold">%{name}</span>.'
+  invited_by_html: 'Запрошений користувачем <span class="font-semibold">%{name}</span>'
+  you_have_been_invited_to_submit_a_form: Вас запросили подати форму
+  signed_on_time: 'Підписаний %{time}'
+  form_has_been_submitted_already: Форма вже була подана
+  send_copy_to_email: Надіслати копію на Email
+  sending: Надсилання
+  resubmit: Подати знову
+  or: або
+  download_documents: Завантажити документи
+  downloading: Завантаження
+
+cs:
+  email: Email
+  digitally_signed_by: Digitálně podepsáno uživatelem
+  role: Role
+  provide_your_email_to_start: Zadejte svůj email pro zahájení
+  start: Zahájit
+  starting: Zahajování
+  form_has_been_deleted_by_html: 'Formulář byl smazán uživatelem <span class="font-semibold">%{name}</span>.'
+  invited_by_html: 'Pozván uživatelem <span class="font-semibold">%{name}</span>'
+  you_have_been_invited_to_submit_a_form: Byli jste pozváni k odeslání formuláře
+  signed_on_time: 'Podepsáno %{time}'
+  form_has_been_submitted_already: Formulář již byl odeslán
+  send_copy_to_email: Odeslat kopii na Email
+  sending: Odesílání
+  resubmit: Odeslat znovu
+  or: nebo
+  download_documents: Stáhnout dokumenty
+  downloading: Stahování
+
+he:
+  email: דוא"ל
+  digitally_signed_by: חתום דיגיטלית על ידי
+  role: תפקיד
+  provide_your_email_to_start: ספק את כתובת הדוא"ל שלך כדי להתחיל
+  start: התחל
+  starting: מתחיל
+  form_has_been_deleted_by_html: 'הטופס נמחק על ידי <span class="font-semibold">%{name}</span>.'
+  invited_by_html: 'הוזמן על ידי <span class="font-semibold">%{name}</span>'
+  you_have_been_invited_to_submit_a_form: הוזמנת להגיש טופס
+  signed_on_time: 'חתום ב-%{time}'
+  form_has_been_submitted_already: הטופס כבר נשלח
+  send_copy_to_email: שלח עותק לדוא"ל
+  sending: שולח
+  resubmit: שלח מחדש
+  or: או
+  download_documents: הורד מסמכים
+  downloading: מוריד
+
+en-US:
+  <<: *en
   date:
     formats:
       default: "%m/%d/%Y"
 
 en-GB:
-  digitally_signed_by: Digitally signed by
-  role: Role
+  <<: *en
   date:
     formats:
       default: "%d/%m/%Y"
 
 es-ES:
-  digitally_signed_by: Firmado digitalmente por
-  role: Rol
+  <<: *es
 
 fr-FR:
-  digitally_signed_by: Signé numériquement par
-  role: Rôle
+  <<: *fr
 
 pt-PT:
-  digitally_signed_by: Assinado digitalmente por
-  role: Função
+  <<: *pt
 
 de-DE:
-  digitally_signed_by: Digital signiert von
-  role: Rolle
+  <<: *de