diff --git a/terminatorlib/optionparse.py b/terminatorlib/optionparse.py
index 1c36ad21..f22e4207 100755
--- a/terminatorlib/optionparse.py
+++ b/terminatorlib/optionparse.py
@@ -49,7 +49,7 @@ def parse_options():
     parser.add_option('-v', '--version', action='store_true', dest='version',
             help=_('Display program version'))
     parser.add_option('-m', '--maximise', action='store_true', dest='maximise',
-            help=_('Maximise the window'))
+            help=_('Maximize the window'))
     parser.add_option('-f', '--fullscreen', action='store_true',
             dest='fullscreen', help=_('Make the window fill the screen'))
     parser.add_option('-b', '--borderless', action='store_true',
diff --git a/terminatorlib/preferences.glade b/terminatorlib/preferences.glade
index 4bc577a8..4b0690b8 100644
--- a/terminatorlib/preferences.glade
+++ b/terminatorlib/preferences.glade
@@ -69,7 +69,7 @@
         <col id="0" translatable="yes">Black on white</col>
       </row>
       <row>
-        <col id="0" translatable="yes">Grey on black</col>
+        <col id="0" translatable="yes">Gray on black</col>
       </row>
       <row>
         <col id="0" translatable="yes">Green on black</col>
diff --git a/terminatorlib/prefseditor.py b/terminatorlib/prefseditor.py
index 3f791e72..f2f25805 100755
--- a/terminatorlib/prefseditor.py
+++ b/terminatorlib/prefseditor.py
@@ -116,7 +116,7 @@ class PrefsEditor:
                         'resize_right'     : _('Resize the terminal right'),
                         'move_tab_right'   : _('Move the tab right'),
                         'move_tab_left'    : _('Move the tab left'),
-                        'toggle_zoom'      : _('Maximise terminal'),
+                        'toggle_zoom'      : _('Maximize terminal'),
                         'scaled_zoom'      : _('Zoom terminal'),
                         'next_tab'         : _('Switch to the next tab'),
                         'prev_tab'         : _('Switch to the previous tab'),
diff --git a/terminatorlib/terminal_popup_menu.py b/terminatorlib/terminal_popup_menu.py
index ad67f3b9..f4b8edcf 100755
--- a/terminatorlib/terminal_popup_menu.py
+++ b/terminatorlib/terminal_popup_menu.py
@@ -157,7 +157,7 @@ class TerminalPopupMenu(object):
             item.set_sensitive(sensitive)
             menu.append(item)
 
-            item = gtk.MenuItem(_('Ma_ximise terminal'))
+            item = gtk.MenuItem(_('Ma_ximize terminal'))
             item.connect('activate', terminal.maximise)
             item.set_sensitive(sensitive)
             menu.append(item)