diff --git a/src/applications/config/check/PhabricatorFileinfoSetupCheck.php b/src/applications/config/check/PhabricatorFileinfoSetupCheck.php
--- a/src/applications/config/check/PhabricatorFileinfoSetupCheck.php
+++ b/src/applications/config/check/PhabricatorFileinfoSetupCheck.php
@@ -10,7 +10,7 @@
     if (!extension_loaded('fileinfo')) {
       $message = pht(
         "The '%s' extension is not installed. Without '%s', ".
-        "support, this software may not be able to determine the MIME types ".
+        "this server may not be able to determine the MIME types ".
         "of uploaded files.",
         'fileinfo',
         'fileinfo');
diff --git a/src/applications/config/check/PhabricatorGDSetupCheck.php b/src/applications/config/check/PhabricatorGDSetupCheck.php
--- a/src/applications/config/check/PhabricatorGDSetupCheck.php
+++ b/src/applications/config/check/PhabricatorGDSetupCheck.php
@@ -9,7 +9,7 @@
   protected function executeChecks() {
     if (!extension_loaded('gd')) {
       $message = pht(
-        "The '%s' extension is not installed. Without '%s', support, ".
+        "The '%s' extension is not installed. Without '%s' support, ".
         "this server will not be able to process or resize images ".
         "(for example, to generate thumbnails). Install or enable '%s'.",
         'gd',
diff --git a/src/applications/config/option/PhabricatorCoreConfigOptions.php b/src/applications/config/option/PhabricatorCoreConfigOptions.php
--- a/src/applications/config/option/PhabricatorCoreConfigOptions.php
+++ b/src/applications/config/option/PhabricatorCoreConfigOptions.php
@@ -100,7 +100,7 @@
         ->setDescription(
           pht(
             "These alternative URIs will be able to access 'normal' pages ".
-            "on your this install. Other features such as OAuth ".
+            "on this install. Other features such as OAuth ".
             "won't work. The major use case for this is moving installs ".
             "across domains."))
         ->addExample(
diff --git a/src/applications/config/option/PhabricatorMetaMTAConfigOptions.php b/src/applications/config/option/PhabricatorMetaMTAConfigOptions.php
--- a/src/applications/config/option/PhabricatorMetaMTAConfigOptions.php
+++ b/src/applications/config/option/PhabricatorMetaMTAConfigOptions.php
@@ -24,7 +24,7 @@
 When a user takes an action which generates an email notification (like
 commenting on a Differential revision), the "From" address can either be set
 to the user's email address (like "alincoln@logcabin.com") or the
-"metamta.defualt-address" address.
+"metamta.default-address" address.
 
 The user experience is generally better if the user's real address is used as
 the "From" header value, since the messages are easier to organize when they
diff --git a/src/applications/config/option/PhabricatorSyntaxHighlightingConfigOptions.php b/src/applications/config/option/PhabricatorSyntaxHighlightingConfigOptions.php
--- a/src/applications/config/option/PhabricatorSyntaxHighlightingConfigOptions.php
+++ b/src/applications/config/option/PhabricatorSyntaxHighlightingConfigOptions.php
@@ -44,7 +44,7 @@
           ))
         ->setDescription(
           pht(
-            'Syntax highlighting a supported for a few languages by '.
+            'Syntax highlighting is supported for a few languages by '.
             'default, but you can install Pygments (a third-party syntax '.
             'highlighting tool) to provide support for many more languages.'.
             "\n\n".
diff --git a/src/applications/harbormaster/conduit/HarbormasterSendMessageConduitAPIMethod.php b/src/applications/harbormaster/conduit/HarbormasterSendMessageConduitAPIMethod.php
--- a/src/applications/harbormaster/conduit/HarbormasterSendMessageConduitAPIMethod.php
+++ b/src/applications/harbormaster/conduit/HarbormasterSendMessageConduitAPIMethod.php
@@ -42,7 +42,7 @@
 However, builds require long-running background processing and Habormaster
 objects have a more complex lifecycle than most other application objects and
 may spend significant periods of time locked by daemon processes during build
-execition. A synchronous edit might need to wait an arbitrarily long amount of
+execution. A synchronous edit might need to wait an arbitrarily long amount of
 time for this lock to become available so the edit could be applied.
 
 Additionally, some edits may also require an arbitrarily long amount of time to
diff --git a/src/applications/harbormaster/xaction/build/HarbormasterBuildMessageTransaction.php b/src/applications/harbormaster/xaction/build/HarbormasterBuildMessageTransaction.php
--- a/src/applications/harbormaster/xaction/build/HarbormasterBuildMessageTransaction.php
+++ b/src/applications/harbormaster/xaction/build/HarbormasterBuildMessageTransaction.php
@@ -134,7 +134,7 @@
           PhabricatorPolicyCapability::CAN_EDIT);
       } catch (PhabricatorPolicyException $ex) {
         throw new HarbormasterMessageException(
-          pht('Insufficent Build Plan Permission'),
+          pht('Insufficient Build Plan Permission'),
           pht(
             'The build plan for this build is configured to prevent '.
             'users who can not edit it from issuing commands to the '.
diff --git a/src/applications/phortune/provider/PhortunePayPalPaymentProvider.php b/src/applications/phortune/provider/PhortunePayPalPaymentProvider.php
--- a/src/applications/phortune/provider/PhortunePayPalPaymentProvider.php
+++ b/src/applications/phortune/provider/PhortunePayPalPaymentProvider.php
@@ -42,7 +42,7 @@
       "    into the fields above.\n\n".
       "You can select whether the provider operates in test mode or ".
       "accepts live payments using the **Mode** dropdown above.\n\n".
-      "You can either use `sandbox.paypal.com` to retrieve live credentials, ".
+      "You can either use `sandbox.paypal.com` to retrieve test credentials, ".
       "or `paypal.com` to retrieve live credentials.");
   }