diff --git a/omemo/file_crypto.py b/omemo/file_crypto.py
index e76b9e3..646f59b 100644
--- a/omemo/file_crypto.py
+++ b/omemo/file_crypto.py
@@ -144,8 +144,8 @@ class FileDecryption:
         file.filepath = os.path.join(DIRECTORY, newfilename)
 
     def finished(self, file):
-        question = 'Do you want to open %s' % file.filename
-        YesNoDialog('Open File', question,
+        question = _('Do you want to open %s') % file.filename
+        YesNoDialog(_('Open File'), question,
                     transient_for=self.window,
                     on_response_yes=(self.open_file, file.filepath))
         return False
@@ -169,18 +169,18 @@ class Download:
         self.download()
 
     def download(self):
-        GLib.idle_add(self.progressbar.set_text, 'Downloading...')
+        GLib.idle_add(self.progressbar.set_text, _('Downloading...'))
         data = self.load_url()
         if isinstance(data, str):
             GLib.idle_add(self.progressbar.close_dialog)
             GLib.idle_add(self.error, data)
             return
 
-        GLib.idle_add(self.progressbar.set_text, 'Decrypting...')
+        GLib.idle_add(self.progressbar.set_text, _('Decrypting...'))
         decrypted_data = self.aes_decrypt(data)
 
         GLib.idle_add(
-            self.progressbar.set_text, 'Writing file to harddisk...')
+            self.progressbar.set_text, _('Writing file to harddisk...'))
         self.write_file(decrypted_data)
 
         GLib.idle_add(self.progressbar.close_dialog)
diff --git a/omemo/omemo_connection.py b/omemo/omemo_connection.py
index 60d8603..e3995f1 100644
--- a/omemo/omemo_connection.py
+++ b/omemo/omemo_connection.py
@@ -493,8 +493,8 @@ class OMEMOConnection:
         event.msg_iq.addChild(node=eme_node)
 
         # Add Message for devices that dont support OMEMO
-        support_msg = 'You received a message encrypted with ' \
-                      'OMEMO but your client doesnt support OMEMO.'
+        support_msg = _('You received a message encrypted with ' \
+                      'OMEMO but your client doesnt support OMEMO.')
         event.msg_iq.setBody(support_msg)
 
         # Store Hint for MAM
diff --git a/omemo/ui.py b/omemo/ui.py
index e95ec07..4db7595 100644
--- a/omemo/ui.py
+++ b/omemo/ui.py
@@ -192,10 +192,10 @@ class OMEMOConfigDialog(GajimPluginConfigDialog):
             fpr = fpr[31:-12]
 
             YesNoDialog(
-                'Delete Fingerprint?',
-                'Do you want to delete the '
-                'fingerprint of <b>{}</b> on your account <b>{}</b>?'
-                '\n\n<tt>{}</tt>'.format(jid, account, fpr),
+                _('Delete Fingerprint?'),
+                _('Do you want to delete the '
+                'fingerprint of <b>{jid}</b> on your account <b>{account}</b>?'
+                '\n\n<tt>{fingerprint}</tt>').format(jid=jid, account=account, fingerprint=fpr),
                 on_response_yes=on_yes, transient_for=self)
 
     def trust_button_clicked_cb(self, button, *args):
@@ -223,10 +223,10 @@ class OMEMOConfigDialog(GajimPluginConfigDialog):
             identity_key = record.getSessionState().getRemoteIdentityKey()
 
             YesNoDialog(
-                'Trust / Revoke Fingerprint?',
-                'Do you want to trust the fingerprint of <b>{}</b> '
-                'on your account <b>{}</b>?\n\n'
-                '<tt>{}</tt>'.format(jid, account, fpr),
+                _('Trust / Revoke Fingerprint?'),
+                _('Do you want to trust the fingerprint of <b>{jid}</b> '
+                'on your account <b>{account}</b>?\n\n'
+                '<tt>{fingerprint}</tt>').format(jid=jid, account=account, fingerprint=fpr),
                 on_response_yes=(on_yes, identity_key),
                 on_response_no=(on_no, identity_key),
                 transient_for=self)
@@ -365,7 +365,7 @@ class FingerprintWindow(Gtk.Dialog):
         self.omemostate = self.plugin.get_omemo(self.account)
         self.own_jid = app.get_jid_from_account(self.account)
         Gtk.Dialog.__init__(self,
-                            title=('Fingerprints for %s') % contact.jid,
+                            title=(_('Fingerprints for %s')) % contact.jid,
                             parent=parent,
                             flags=Gtk.DialogFlags.DESTROY_WITH_PARENT)
         close_button = self.add_button(Gtk.STOCK_CLOSE, Gtk.ResponseType.CLOSE)
@@ -432,10 +432,10 @@ class FingerprintWindow(Gtk.Dialog):
             identity_key = record.getSessionState().getRemoteIdentityKey()
 
             YesNoDialog(
-                'Trust / Revoke Fingerprint?',
-                'Do you want to trust the fingerprint of <b>{}</b> '
-                'on your account <b>{}</b>?\n\n'
-                '<tt>{}</tt>'.format(jid, self.account, fpr),
+                _('Trust / Revoke Fingerprint?'),
+                _('Do you want to trust the fingerprint of <b>{jid}</b> '
+                'on your account <b>{account}</b>?\n\n'
+                '<tt>{fingerprint}</tt>').format(jid=jid, account=self.account, fingerprint=fpr),
                 on_response_yes=(on_yes, identity_key),
                 on_response_no=(on_no, identity_key),
                 transient_for=self)