diff --git a/gajim/common/jingle_rtp.py b/gajim/common/jingle_rtp.py
index 41988afbd7510fe679b4a386ccbcd0d06a221256..52e470c606bde28615e3a1142d4f0501d1b13b51 100644
--- a/gajim/common/jingle_rtp.py
+++ b/gajim/common/jingle_rtp.py
@@ -130,7 +130,7 @@ def make_bin_from_config(self, config_key, pipeline, text):
                     None,
                     conn=self.session.connection,
                     level='error',
-                    pri_txt=_(f'{text} configuration error'),
+                    pri_txt=_('%s configuration error' % text),
                     sec_txt=_('Couldn’t set up %(text)s. Check your '
                               'configuration.\nPipeline:\n%(pipeline)s\n'
                               'Error:\n%(error)s') % {
diff --git a/gajim/groupchat_control.py b/gajim/groupchat_control.py
index 48431b9cb3afa1460631a0639c3a536ea48c4ff4..41b2919d5bc14f1a8757e77b01b0e99404d65a6e 100644
--- a/gajim/groupchat_control.py
+++ b/gajim/groupchat_control.py
@@ -495,7 +495,7 @@ def invite(self, contact_jid):
         con = app.connections[self.account]
         message_id = con.get_module('MUC').invite(self.room_jid, contact_jid)
         self.add_info_message(
-            _(f'{contact_jid} has been invited to this group chat'),
+            _('%s has been invited to this group chat' % contact_jid),
             message_id=message_id)
 
     def _on_destroy_room(self, _action, _param):
@@ -591,7 +591,7 @@ def _on_upload_avatar_result(self, task):
         try:
             task.finish()
         except Exception as error:
-            self.add_info_message(_(f'Avatar upload failed: {error}'))
+            self.add_info_message(_('Avatar upload failed: %s' % error))
 
         else:
             self.add_info_message(_('Avatar upload successful'))
diff --git a/gajim/gui_interface.py b/gajim/gui_interface.py
index fe596fe68bbda19dc15a9c7d679fdff2203192fe..8cc5e5fc08cf135d22666b2dd2b1dfcd4b434c62 100644
--- a/gajim/gui_interface.py
+++ b/gajim/gui_interface.py
@@ -389,7 +389,8 @@ def handle_event_gc_invitation(self, event):
         if helpers.allow_showing_notification(event.account):
             contact_name = event.get_inviter_name()
             event_type = _('Group Chat Invitation')
-            text = _(f'{contact_name} invited you to {event.info.muc_name}')
+            text = _('%(contact)s invited you to %(chat)s') % {
+                'contact': contact_name, 'chat': event.info.muc_name}
             app.notification.popup(event_type,
                                    str(event.from_),
                                    event.account,
@@ -925,7 +926,7 @@ def handle_event_jingle_incoming(self, event):
         if helpers.allow_showing_notification(account):
             heading = _('Incoming Call')
             contact = app.get_name_from_jid(account, event.jid)
-            text = _(f'{contact} is calling')
+            text = _('%s is calling' % contact)
             app.notification.popup(
                 heading,
                 event.fjid,