diff --git a/manual/conversion.rst b/manual/conversion.rst
index fcea465d8e..a91b8fcde6 100644
--- a/manual/conversion.rst
+++ b/manual/conversion.rst
@@ -398,7 +398,7 @@ operates on the intermediate XHTML produced by the conversion pipeline. Use the
 :ref:`conversion-introduction` to figure out the appropriate settings for your book. There is also a button for a XPath wizard
 to help with the generation of simple XPath expressions.
 
-By default, calibre uses the following expression for chapter detection::
+By default, calibre uses the following expression for detecting chapters::
 
     //*[((name()='h1' or name()='h2') and re:test(., 'chapter|book|section|part\s+', 'i')) or @class = 'chapter']
 
diff --git a/src/calibre/gui2/convert/debug.ui b/src/calibre/gui2/convert/debug.ui
index 6e1c72eaa8..f97ae175ca 100644
--- a/src/calibre/gui2/convert/debug.ui
+++ b/src/calibre/gui2/convert/debug.ui
@@ -44,7 +44,7 @@
    <item row="0" column="0" colspan="2">
     <widget class="QLabel" name="label">
      <property name="text">
-      <string>Choose a folder to put the debug output into. If you specify a folder, calibre will place a lot of debug output into it. This will be useful in understanding the conversion process and figuring out the correct values for conversion parameters like Table of Contents and Chapter Detection.</string>
+      <string>Choose a folder to put the debug output into. If you specify a folder, calibre will place a lot of debug output into it. This will be useful in understanding the conversion process and figuring out the correct values for conversion parameters like Table of Contents and Chapter detection.</string>
      </property>
      <property name="wordWrap">
       <bool>true</bool>
diff --git a/src/calibre/gui2/convert/look_and_feel.ui b/src/calibre/gui2/convert/look_and_feel.ui
index 895dba3b75..9039a07f21 100644
--- a/src/calibre/gui2/convert/look_and_feel.ui
+++ b/src/calibre/gui2/convert/look_and_feel.ui
@@ -382,7 +382,7 @@
        <item>
         <widget class="QGroupBox" name="opt_filter_css">
          <property name="title">
-          <string>Filter Style Information</string>
+          <string>Filter style information</string>
          </property>
          <layout class="QVBoxLayout" name="verticalLayout_3">
           <item>
diff --git a/src/calibre/gui2/lrf_renderer/main.py b/src/calibre/gui2/lrf_renderer/main.py
index f092b80786..f60736f50c 100644
--- a/src/calibre/gui2/lrf_renderer/main.py
+++ b/src/calibre/gui2/lrf_renderer/main.py
@@ -74,7 +74,7 @@ class Main(MainWindow, Ui_MainWindow):
         Ui_MainWindow.__init__(self)
         self.setupUi(self)
         self.setAttribute(Qt.WidgetAttribute.WA_DeleteOnClose)
-        self.setWindowTitle(__appname__ + _(' - LRF Viewer'))
+        self.setWindowTitle(__appname__ + _(' - LRF viewer'))
 
         self.logger = logger
         self.opts = opts
diff --git a/src/calibre/gui2/lrf_renderer/main.ui b/src/calibre/gui2/lrf_renderer/main.ui
index ad342ea394..997d4e1d91 100644
--- a/src/calibre/gui2/lrf_renderer/main.ui
+++ b/src/calibre/gui2/lrf_renderer/main.ui
@@ -17,7 +17,7 @@
    </sizepolicy>
   </property>
   <property name="windowTitle">
-   <string>LRF Viewer</string>
+   <string>LRF viewer</string>
   </property>
   <property name="windowIcon">
    <iconset>
@@ -119,7 +119,7 @@
   </widget>
   <widget class="QToolBar" name="tool_bar">
    <property name="windowTitle">
-    <string>LRF Viewer toolbar</string>
+    <string>LRF viewer toolbar</string>
    </property>
    <property name="allowedAreas">
     <set>Qt::AllToolBarAreas</set>
diff --git a/src/calibre/gui2/ui.py b/src/calibre/gui2/ui.py
index 318b8c918c..163194a64a 100644
--- a/src/calibre/gui2/ui.py
+++ b/src/calibre/gui2/ui.py
@@ -967,7 +967,7 @@ class Main(MainWindow, MainWindowMixin, DeviceMixin, EmailMixin,  # {{{
                 splitting fails.
                 <p>You can <b>work around the problem</b> by either increasing the
                 maximum split size under <i>EPUB output</i> in the conversion dialog,
-                or by turning on Heuristic Processing, also in the conversion
+                or by turning on Heuristic processing, also in the conversion
                 dialog. Note that if you make the maximum split size too large,
                 your e-book reader may have trouble with the EPUB.
                         ''')
diff --git a/src/pyj/book_list/conversion_widgets.pyj b/src/pyj/book_list/conversion_widgets.pyj
index 65017853f8..e2ad5b0504 100644
--- a/src/pyj/book_list/conversion_widgets.pyj
+++ b/src/pyj/book_list/conversion_widgets.pyj
@@ -285,7 +285,7 @@ def look_and_feel(container):
     subhead(_('St&yling'))
     g = E.div(class_='simple-group')
     container.appendChild(g)
-    g.appendChild(lineedit('filter_css', _('Filter Style Information'), 40))
+    g.appendChild(lineedit('filter_css', _('Filter style information'), 40))
     container.appendChild(textarea('extra_css', 'E&xtra CSS'))
 # }}}