diff --git a/doc/activity.md b/doc/activity.md
index c15690e9fe3..48d7cfb423d 100644
--- a/doc/activity.md
+++ b/doc/activity.md
@@ -24,7 +24,7 @@ Returns an array of watched repos.
 
 > *** Requires [authentication](security.md). ***
 
-### Get repos that a authenticated user has starred
+### Get repos that an authenticated user has starred
 
 ```php
 $activity = $client->api('current_user')->starring()->all();
@@ -38,7 +38,7 @@ $activity = $client->api('user')->events('ornicar');
 ```
 Returns an array of private and public events created for all repos related to the user.
 
-### Get repos that a authenticated user has starred with creation date
+### Get repos that an authenticated user has starred with creation date
 
 Support for getting the star creation timestamp in the response, using the custom `Accept: application/vnd.github.v3.star+json` header.
 
@@ -75,7 +75,7 @@ $activity = $client->api('current_user')->starring()->unstar($owner, $repo);
 Throws an Exception in case of failure or NULL in case of success.
 
 
-### Get repos that a authenticated user is watching
+### Get repos that an authenticated user is watching
 
 ```php
 $activity = $client->api('current_user')->watchers()->all();
diff --git a/doc/caching.md b/doc/caching.md
index a95f92e9eea..1a004cc8781 100644
--- a/doc/caching.md
+++ b/doc/caching.md
@@ -26,5 +26,5 @@ $client->removeCache();
 ```
 
 Using cache, the client will get cached responses if resources haven't changed since last time,
-**without** reaching the `X-Rate-Limit` [imposed by github](http://developer.github.com/v3/#rate-limiting).
+**without** reaching the `X-Rate-Limit` [imposed by GitHub](http://developer.github.com/v3/#rate-limiting).
 
diff --git a/doc/currentuser/publickeys.md b/doc/currentuser/publickeys.md
index a9d19018f2d..444dd58fa0c 100644
--- a/doc/currentuser/publickeys.md
+++ b/doc/currentuser/publickeys.md
@@ -25,7 +25,7 @@ $key = $client->me()->keys()->show(1234);
 $key = $client->me()->keys()->create(array('title' => 'key title', 'key' => 12345));
 ```
 
-Adds a key with title 'key title' to the authenticated user and returns a the created key for the user.
+Adds a key with title 'key title' to the authenticated user and returns the created key for the user.
 
 ### Remove a public key from the authenticated user.
 
diff --git a/doc/customize.md b/doc/customize.md
index 1d5ae51e766..b475ee57322 100644
--- a/doc/customize.md
+++ b/doc/customize.md
@@ -22,7 +22,7 @@ To use the symfony http client
 composer require symfony/http-client nyholm/psr7
 ```
 
-To set up the github client with this http client
+To set up the GitHub client with this http client
 
 ```php
 use Github\Client;
diff --git a/doc/graphql.md b/doc/graphql.md
index e9ba581c506..dfe83639085 100644
--- a/doc/graphql.md
+++ b/doc/graphql.md
@@ -11,7 +11,7 @@ $rateLimits = $client->api('graphql')->execute($query);
 
 #### Authentication
 
-To use [GitHub v4 API (GraphQL API)](http://developer.github.com/v4/) requests must [authenticated](security.md).
+To use [GitHub v4 API (GraphQL API)](http://developer.github.com/v4/) requests must [authenticate](security.md).
 
 ```php
 $client->authenticate($token, null, Github\AuthMethod::ACCESS_TOKEN);
diff --git a/doc/project/projects.md b/doc/project/projects.md
index 5763e0060e7..103bbe10c86 100644
--- a/doc/project/projects.md
+++ b/doc/project/projects.md
@@ -1,10 +1,10 @@
 ## Repo / Projects API
 [Back to the "Repos API"](../) | [Back to the navigation](../README.md)
 
-This api is currently only available to developers in Early Access. To access the API during the Early Access period, 
+This api is currently only available to developers in Early Access. To access the API during the Early Access period,
 you must provide a custom media type in the Accept header.
 
-Both repositories and organisations have projects. The api is only different for gettings all or a single project.
+Both repositories and organisations have projects. The api is only different for getting all or a single project.
 All the example use the repository projects api but this also works form the organization api (`$client->api('org_projects')`)
 
 ```php
diff --git a/doc/pull_request/comments.md b/doc/pull_request/comments.md
index 87ca5f8e443..e996f804989 100644
--- a/doc/pull_request/comments.md
+++ b/doc/pull_request/comments.md
@@ -67,7 +67,7 @@ $comment = $client->api('pull_request')->comments()->update('KnpLabs', 'php-gith
 
 This returns the details of the updated comment.
 
-### Remove a review comment from an pull request
+### Remove a review comment from a pull request
 
 > Requires [authentication](../security.md).
 
diff --git a/doc/repo/hooks.md b/doc/repo/hooks.md
index 1f89ed40405..a4f9d9af655 100644
--- a/doc/repo/hooks.md
+++ b/doc/repo/hooks.md
@@ -1,7 +1,7 @@
 ## Repo / Hooks API
 [Back to the "Repos API"](../repos.md) | [Back to the navigation](../README.md)
 
-For extended info see the [Github documentation](https://docs.github.com/en/rest/reference/repos#webhooks)
+For extended info see the [GitHub documentation](https://docs.github.com/en/rest/reference/repos#webhooks)
 
 ### List repository webhooks
 
diff --git a/doc/repos.md b/doc/repos.md
index ab412dc77c2..a0f822ce446 100644
--- a/doc/repos.md
+++ b/doc/repos.md
@@ -310,8 +310,8 @@ $activity = $client->api('repo')->activity('ornicar', 'php-github-api');
 Returns an array of commit activity group by week.
 
 ### `Moved` repositories
-Github repositories can be moved to another org/user, but it remains the `id`.
-In case if you can't no more find repo, you can retrieve it by `id`:
+GitHub repositories can be moved to another org/user, but it remains the `id`.
+In case you can't find the repo anymore, you can retrieve it by `id`:
 
 ```php
 use Github\HttpClient\Message\ResponseMediator;
@@ -365,7 +365,7 @@ $repo = $client->api('repo')->transfer('KnpLabs', 'php-github-api', 'github', [1
 
 ### Create a repository dispatch event
 
-Example when you want to configure custom github action workflows.
+Example when you want to configure custom GitHub action workflows.
 
 ```php
 $client->api('repo')->dispatch('KnpLabs', 'php-github-api', 'acme-event', ['foo'=>'bar']);
diff --git a/doc/request_response_info.md b/doc/request_response_info.md
index 880e7f85a22..32e30981ea4 100644
--- a/doc/request_response_info.md
+++ b/doc/request_response_info.md
@@ -3,7 +3,7 @@
 
 ### Get response headers
 
-Get the repsonse header for the latest request
+Get the response header for the latest request
 
 ```
 $headers = $githubClient->getLastResponse()->getHeaders();
diff --git a/doc/result_pager.md b/doc/result_pager.md
index b13432cb569..f074f1cc4a1 100644
--- a/doc/result_pager.md
+++ b/doc/result_pager.md
@@ -3,7 +3,7 @@
 
 ### Usage examples
 
-#### Get all repositories of a organization
+#### Get all repositories of an organization
 
 ```php
 $client = new Github\Client();
@@ -21,7 +21,7 @@ Parameters of the `fetchAll` method:
 * The method of the API object you're using
 * The parameters of the method
 
-Parameters are passed to the API method via [call_user_func_array](https://www.php.net/manual/en/function.call-user-func-array.php). 
+Parameters are passed to the API method via [call_user_func_array](https://www.php.net/manual/en/function.call-user-func-array.php).
 
 ```php
 $parameters = array('github', 'all', 1); // $organization, $type, $page
diff --git a/doc/security.md b/doc/security.md
index 7aed2f9806c..a8596de20b1 100644
--- a/doc/security.md
+++ b/doc/security.md
@@ -33,7 +33,7 @@ further requests are done as the given user.
 ### Authenticating as an Integration
 
 To authenticate as an integration you need to supply a JSON Web Token with `Github\AuthMethod::JWT` to request
-and installation access token which is then usable with `Github\AuthMethod::ACCESS_TOKEN`. [Github´s integration
+and installation access token which is then usable with `Github\AuthMethod::ACCESS_TOKEN`. [GitHub´s integration
 authentication docs](https://developer.github.com/apps/building-github-apps/authentication-options-for-github-apps/#authenticating-as-a-github-app) describe the flow in detail.
 It´s important for integration requests to use the custom Accept header `application/vnd.github.machine-man-preview`.
 
@@ -67,5 +67,5 @@ $jwt = $config->builder(ChainedFormatter::withUnixTimestampDates())
 $github->authenticate($jwt->toString(), null, Github\AuthMethod::JWT);
 ```
 
-The `$integrationId` you can find in the about section of your github app.
+The `$integrationId` you can find in the about section of your GitHub app.
 The `$installationId` you can find by installing the app and using the id in the url.
diff --git a/doc/testing.md b/doc/testing.md
index ec2effb3b5c..36df32097eb 100644
--- a/doc/testing.md
+++ b/doc/testing.md
@@ -4,7 +4,7 @@
 
 ### Run Test Suite
 
-The code is unit tested, there are also some functional tests. To run tests on 
+The code is unit tested, there are also some functional tests. To run tests on
 your machine, from a CLI, run
 
 ```bash
@@ -14,12 +14,12 @@ $ phpunit
 
 ### Write tests
 
-It is always great if someone wants to contribute and extend the functionality of 
-the API client. But all new features must be properly tested. To test a new API 
-function, one should test its communication with the HTTP client. The code should 
-never make an actual call to Github. Testing could easily be done with mocking. 
+It is always great if someone wants to contribute and extend the functionality of
+the API client. But all new features must be properly tested. To test a new API
+function, one should test its communication with the HTTP client. The code should
+never make an actual call to GitHub. Testing could easily be done with mocking.
 
-If you want to write test for the function that shows you comments to a gist. 
+If you want to write test for the function that shows you comments to a gist.
 
 ```php
 class Comments extends AbstractApi
@@ -32,7 +32,7 @@ class Comments extends AbstractApi
 }
 ```
 
-The test will look like this: 
+The test will look like this:
 
 ```php
 use Github\Tests\Api\TestCase;
@@ -51,7 +51,7 @@ class CommentsTest extends TestCase
 
         // Get the API mock (see "getApiClass" below).
         $api = $this->getApiMock();
-        
+
         $api->expects($this->once())                    // Expect one call
             ->method('get')                             // A GET request
             ->with('/gists/123/comments/456')           // URI should be "/gists/123/comments/456"
@@ -59,14 +59,14 @@ class CommentsTest extends TestCase
 
         // Call Comments::show
         $result = $api->show(123, 456);
-        
-        // Verify that the result is the "Server response" as we expect. 
+
+        // Verify that the result is the "Server response" as we expect.
         $this->assertEquals($expectedValue, $result);
     }
-    
+
     protected function getApiClass()
     {
-        // Tell the "getAPIMock" what class to mock. 
+        // Tell the "getAPIMock" what class to mock.
         return \Github\Api\Gist\Comments::class;
     }
 }
diff --git a/doc/two_factor_authentication.md b/doc/two_factor_authentication.md
index 46e84e0daa5..3b58de49abc 100644
--- a/doc/two_factor_authentication.md
+++ b/doc/two_factor_authentication.md
@@ -1,4 +1,4 @@
-## Two factor authentication
+## Two-factor authentication
 [Back to the navigation](README.md)
 
 
diff --git a/doc/users.md b/doc/users.md
index dbc6a6bb302..48bb0d7dc15 100644
--- a/doc/users.md
+++ b/doc/users.md
@@ -33,7 +33,7 @@ $user = $client->api('user')->show('KnpLabs');
 Returns an array of information about the user.
 
 
-You can also use the User ID, but it will use an undocumented Github API
+You can also use the User ID, but it will use an undocumented GitHub API
 
 ```php
 $user = $client->api('user')->showById(202732);