diff --git a/src/calibre/gui2/store/stores/bubok_portugal_plugin.py b/src/calibre/gui2/store/stores/bubok_portugal_plugin.py
index 4f1f970f98..dced5e721b 100644
--- a/src/calibre/gui2/store/stores/bubok_portugal_plugin.py
+++ b/src/calibre/gui2/store/stores/bubok_portugal_plugin.py
@@ -53,7 +53,7 @@ class BubokPortugalStore(BasicStoreConfig, StorePlugin):
 
                 title = ''.join(data.xpath('.//div[@class="titulo"]/text()'))
 
-                author = ''.join(data.xpath('.//div[@class="author"]/text()'))
+                author = ''.join(data.xpath('.//div[@class="autor"]/text()'))
 
                 price = ''.join(data.xpath('.//div[@class="precio"]/text()'))
 
diff --git a/src/calibre/gui2/store/stores/bubok_publishing_plugin.py b/src/calibre/gui2/store/stores/bubok_publishing_plugin.py
index b6e7930e2c..281b3e1130 100644
--- a/src/calibre/gui2/store/stores/bubok_publishing_plugin.py
+++ b/src/calibre/gui2/store/stores/bubok_publishing_plugin.py
@@ -53,7 +53,7 @@ class BubokPublishingStore(BasicStoreConfig, StorePlugin):
 
                 title = ''.join(data.xpath('.//div[@class="titulo"]/text()'))
 
-                author = ''.join(data.xpath('.//div[@class="author"]/text()'))
+                author = ''.join(data.xpath('.//div[@class="autor"]/text()'))
 
                 price = ''.join(data.xpath('.//div[@class="precio"]/text()'))
 
diff --git a/src/calibre/gui2/store/stores/rw2010_plugin.py b/src/calibre/gui2/store/stores/rw2010_plugin.py
index baa0ab0f71..f57af28270 100644
--- a/src/calibre/gui2/store/stores/rw2010_plugin.py
+++ b/src/calibre/gui2/store/stores/rw2010_plugin.py
@@ -62,7 +62,7 @@ class RW2010Store(BasicStoreConfig, StorePlugin):
                 with closing(br.open(id.strip(), timeout=timeout/4)) as nf:
                     idata = html.fromstring(nf.read())
                     cover_url = ''.join(idata.xpath('//div[@class="boxa"]//div[@class="img"]/img/@src'))
-                    author = ''.join(idata.xpath('//div[@class="boxb"]//h3[text()="Author: "]/span/text()'))
+                    author = ''.join(idata.xpath('//div[@class="boxb"]//h3[text()="Autor: "]/span/text()'))
                     title = ''.join(idata.xpath('//div[@class="boxb"]/h2[1]/text()'))
                     title = re.sub(r'\(#.+\)', '', title)
                     formats = ''.join(idata.xpath('//div[@class="boxb"]//h3[text()="Format pliku: "]/span/text()'))
diff --git a/src/calibre/gui2/tweak_book/preferences.py b/src/calibre/gui2/tweak_book/preferences.py
index 2540b8632f..6cfaf64403 100644
--- a/src/calibre/gui2/tweak_book/preferences.py
+++ b/src/calibre/gui2/tweak_book/preferences.py
@@ -472,7 +472,7 @@ class ToolbarSettings(QWidget):
         self.sl = l = QGridLayout()
         gl.addLayout(l, 1, 0, 1, -1)
 
-        self.gb1 = gb1 = QGroupBox(_('A&available actions'), self)
+        self.gb1 = gb1 = QGroupBox(_('A&vailable actions'), self)
         self.gb2 = gb2 = QGroupBox(_('&Current actions'), self)
         gb1.setFlat(True), gb2.setFlat(True)
         gb1.setSizePolicy(QSizePolicy.Policy.Expanding, QSizePolicy.Policy.Expanding)
diff --git a/src/calibre/gui2/viewer/toolbars.py b/src/calibre/gui2/viewer/toolbars.py
index f8b66cc2e6..972d0985ec 100644
--- a/src/calibre/gui2/viewer/toolbars.py
+++ b/src/calibre/gui2/viewer/toolbars.py
@@ -418,7 +418,7 @@ class ConfigureToolBar(Dialog):
 
         self.h = h = QHBoxLayout()
         l.addLayout(h)
-        self.lg = lg = QGroupBox(_('A&available actions'), self)
+        self.lg = lg = QGroupBox(_('A&vailable actions'), self)
         lg.v = v = QVBoxLayout(lg)
         v.addWidget(self.available_actions)
         h.addWidget(lg)
diff --git a/src/calibre/utils/matcher.py b/src/calibre/utils/matcher.py
index 52ed11f91a..2d77b40059 100644
--- a/src/calibre/utils/matcher.py
+++ b/src/calibre/utils/matcher.py
@@ -274,7 +274,7 @@ def test(return_tests=False):
 
     class Test(unittest.TestCase):
 
-        @unittest.skipIf(is_sanitized, 'Sanitizer enabled can't check for leaks')
+        @unittest.skipIf(is_sanitized, 'Sanitizer enabled can\'t check for leaks')
         def test_mem_leaks(self):
             import gc
             from calibre.utils.mem import get_memory as memory