diff --git a/zenmap/radialnet/gui/NodeNotebook.py b/zenmap/radialnet/gui/NodeNotebook.py
index bdf25df3e..4d8b7dc67 100644
--- a/zenmap/radialnet/gui/NodeNotebook.py
+++ b/zenmap/radialnet/gui/NodeNotebook.py
@@ -81,7 +81,7 @@ SERVICE_COLORS = {'open':            '#ffd5d5',  # noqa
                   'closed|filtered': '#d5ffd5'}  # noqa
 UNKNOWN_SERVICE_COLOR = '#d5d5d5'
 
-TRACE_HEADER = [_('TTL'), _('RTT'), _('IP'), _('Hostname')]
+TRACE_HEADER = ['TTL', 'RTT', 'IP', _('Hostname')]
 
 TRACE_TEXT = _(
     "Traceroute on port <b>%s/%s</b> totalized <b>%d</b> known hops.")
@@ -581,8 +581,8 @@ class SystemPage(BWScrolledWindow):
         table.attach(BWSectionLabel(_('Class')), 1, 2, 0, 1)
         table.attach(BWSectionLabel(_('Values')), 2, 3, 0, 1)
 
-        table.attach(BWSectionLabel(_('TCP *')), 0, 1, 1, 2)
-        table.attach(BWSectionLabel(_('IP ID')), 0, 1, 2, 3)
+        table.attach(BWSectionLabel('TCP *'), 0, 1, 1, 2)
+        table.attach(BWSectionLabel('IP ID'), 0, 1, 2, 3)
         table.attach(BWSectionLabel(_('TCP Timestamp')), 0, 1, 3, 4)
 
         tcp = sequences.get('tcp')
diff --git a/zenmap/radialnet/gui/SaveDialog.py b/zenmap/radialnet/gui/SaveDialog.py
index 47db1916e..763550c46 100644
--- a/zenmap/radialnet/gui/SaveDialog.py
+++ b/zenmap/radialnet/gui/SaveDialog.py
@@ -71,10 +71,10 @@ from zenmapGUI.higwidgets.higdialogs import HIGAlertDialog
 
 
 TYPES = ((_("By extension"), None, None),
-         (_("PDF"), RadialNet.FILE_TYPE_PDF, ".pdf"),
-         (_("PNG"), RadialNet.FILE_TYPE_PNG, ".png"),
-         (_("PostScript"), RadialNet.FILE_TYPE_PS, ".ps"),
-         (_("SVG"), RadialNet.FILE_TYPE_SVG, ".svg"))
+         ("PDF", RadialNet.FILE_TYPE_PDF, ".pdf"),
+         ("PNG", RadialNet.FILE_TYPE_PNG, ".png"),
+         ("PostScript", RadialNet.FILE_TYPE_PS, ".ps"),
+         ("SVG", RadialNet.FILE_TYPE_SVG, ".svg"))
 # Build a reverse index of extensions to file types, for the "By extension"
 # file type.
 EXTENSIONS = {}
diff --git a/zenmap/zenmapCore/NmapParser.py b/zenmap/zenmapCore/NmapParser.py
index 3f6b44edb..581157ac5 100644
--- a/zenmap/zenmapCore/NmapParser.py
+++ b/zenmap/zenmapCore/NmapParser.py
@@ -354,7 +354,7 @@ class HostInfo(object):
                     _("Unknown version")),
                 "service_product": p.get("service_product", ""),
                 "service_extrainfo": p.get("service_extrainfo", ""),
-                "port_state": p.get("port_state", _("Unknown")),
+                "port_state": p.get("port_state", _("unknown")),
                 "protocol": p.get("protocol", "")
                 })
         return services
diff --git a/zenmap/zenmapGUI/About.py b/zenmap/zenmapGUI/About.py
index 0994f9f78..06803b9e2 100644
--- a/zenmap/zenmapGUI/About.py
+++ b/zenmap/zenmapGUI/About.py
@@ -250,13 +250,13 @@ class UmitCredits(HIGWindow):
         self.notebook.append_page(
                 self.design_scroll, Gtk.Label.new(_("Design")))
         self.notebook.append_page(
-                self.soc2007_scroll, Gtk.Label.new(_("SoC 2007")))
+                self.soc2007_scroll, Gtk.Label.new("SoC 2007"))
         self.notebook.append_page(
                 self.contributors_scroll, Gtk.Label.new(_("Contributors")))
         self.notebook.append_page(
                 self.translation_scroll, Gtk.Label.new(_("Translation")))
         self.notebook.append_page(
-                self.nokia_scroll, Gtk.Label.new(_("Maemo")))
+                self.nokia_scroll, Gtk.Label.new("Maemo"))
 
         self.written_by_scroll.add(self.written_by_text)
         self.written_by_text.set_wrap_mode(Gtk.WrapMode.NONE)
diff --git a/zenmap/zenmapGUI/NmapOutputProperties.py b/zenmap/zenmapGUI/NmapOutputProperties.py
index a5fa6a8b5..d621051ec 100644
--- a/zenmap/zenmapGUI/NmapOutputProperties.py
+++ b/zenmap/zenmapGUI/NmapOutputProperties.py
@@ -113,7 +113,7 @@ class NmapOutputProperties(HIGDialog):
                                    "80/tcp   filtered   http"],
                                "date": [_("date"), "2006-05-26 11:14 BRT"],
                                "hostname": [_("hostname"), "scanme.nmap.org"],
-                               "ip": [_("ip"), "127.0.0.1"]}
+                               "ip": ["ip", "127.0.0.1"]}
 
         for p in self.property_names:
             settings = self.nmap_highlight.__getattribute__(p)
diff --git a/zenmap/zenmapGUI/ScanHostDetailsPage.py b/zenmap/zenmapGUI/ScanHostDetailsPage.py
index a63a5fd39..dcd99ddb5 100644
--- a/zenmap/zenmapGUI/ScanHostDetailsPage.py
+++ b/zenmap/zenmapGUI/ScanHostDetailsPage.py
@@ -162,13 +162,13 @@ class HostDetails(HIGVBox):
         self.info_lastboot_label = HIGEntryLabel(na)
 
         # Addresses expander
-        self.ipv4_label = HIGEntryLabel(_('IPv4:'))
+        self.ipv4_label = HIGEntryLabel('IPv4:')
         self.info_ipv4_label = HIGEntryLabel(na)
 
-        self.ipv6_label = HIGEntryLabel(_('IPv6:'))
+        self.ipv6_label = HIGEntryLabel('IPv6:')
         self.info_ipv6_label = HIGEntryLabel(na)
 
-        self.mac_label = HIGEntryLabel(_('MAC:'))
+        self.mac_label = HIGEntryLabel('MAC:')
         self.info_mac_label = HIGEntryLabel(na)
 
         self.vendor_label = HIGEntryLabel(_('Vendor:'))
diff --git a/zenmap/zenmapGUI/ScanOpenPortsPage.py b/zenmap/zenmapGUI/ScanOpenPortsPage.py
index 98f2e0d42..08fcf67e3 100644
--- a/zenmap/zenmapGUI/ScanOpenPortsPage.py
+++ b/zenmap/zenmapGUI/ScanOpenPortsPage.py
@@ -398,7 +398,7 @@ class HostOpenPorts(HIGVBox):
                         p["host"].get_hostname(),
                         int(p.get('portid', "0")),
                         p.get('protocol', ""),
-                        p.get('port_state', _("Unknown")),
+                        p.get('port_state', _("unknown")),
                         get_version_string(p)
                     ]
                 )