diff --git a/Changelog.yaml b/Changelog.yaml
index b3b293154f..171f252106 100644
--- a/Changelog.yaml
+++ b/Changelog.yaml
@@ -296,7 +296,7 @@
 
     - title: "Content server: Fix heading for custom comments columns being duplicated in the book details page"
 
-    - title: "Fix editing of dates not working is the date format is set to iso."
+    - title: "Fix editing of dates not working if the date format is set to iso."
       tickets: [1812560]
 
     - title: "Version 3.39.1 fixes a bug in 3.39.0 that broke copy to library for books that have saved conversion options"
diff --git a/src/calibre/gui2/main.py b/src/calibre/gui2/main.py
index 6ce5f0be95..aeffaa283a 100644
--- a/src/calibre/gui2/main.py
+++ b/src/calibre/gui2/main.py
@@ -455,7 +455,7 @@ def cant_start(msg=_('If you are sure it is not running')+', ',
         what = _('try deleting the file: "%s"') % path
 
     info = base%(where, msg, what)
-    error_dialog(None, _('Cannot Start ')+__appname__,
+    error_dialog(None, _('Cannot start ')+__appname__,
         '<p>'+(_('%s is already running.')%__appname__)+'</p>'+info, det_msg=det_msg, show=True)
 
     raise SystemExit(1)
diff --git a/src/pyj/book_list/book_details.pyj b/src/pyj/book_list/book_details.pyj
index 364786558a..7ac3acc62c 100644
--- a/src/pyj/book_list/book_details.pyj
+++ b/src/pyj/book_list/book_details.pyj
@@ -715,7 +715,7 @@ def do_copy_to_library(book_id, target_library_id, target_library_name):
             return
         if end_type is not 'load':
             error_dialog(_('Failed to copy book'), _(
-                'Failed to copy the book "{}" click "Show details" for more information.').format(title),
+                'Failed to copy the book "{}". Click "Show details" for more information.').format(title),
                 xhr.error_html)
             return
         try:
@@ -724,11 +724,11 @@ def do_copy_to_library(book_id, target_library_id, target_library_name):
                 raise Exception('bad')
         except:
             error_dialog(_('Failed to copy book'), _(
-                'Failed to copy the book "{}" got an invalid response from calibre').format(title))
+                'Failed to copy the book "{}" because of an invalid response from calibre').format(title))
             return
         if not response.ok:
             error_dialog(_('Failed to copy book'), _(
-                'Failed to copy the book "{}" click "Show details" for more information.').format(title),
+                'Failed to copy the book "{}". Click "Show details" for more information.').format(title),
                 response.payload
             )
             return