diff --git a/README.md b/README.md
index 1f6b30cc8c..437309afba 100644
--- a/README.md
+++ b/README.md
@@ -6,7 +6,7 @@
 | [![Scrutinizer CI](https://scrutinizer-ci.com/images/logo.png) scrutinizer](https://scrutinizer-ci.com/g/EGroupware/egroupware/) | runs static analysis on our codebase |
 | <img src="https://encrypted-tbn0.gstatic.com/images?q=tbn%3AANd9GcQ2scF5HUwLnJVnk2UhYwWpUXHmLQYNXM5yBw&usqp=CAU" width="110" alt="BrowserStack" /> | manual testing with unusual browser versions or platforms |
 
-### Default and prefered installation method for EGroupware is via your Linux package manager:
+### Default and preferred installation method for EGroupware is via your Linux package manager:
 
 * [Installation & Update instructions](https://github.com/EGroupware/egroupware/wiki/Installation-using-egroupware-docker-RPM-DEB-package)
 * [Distribution specific instructions](https://github.com/EGroupware/egroupware/wiki/Distribution-specific-instructions)
@@ -17,7 +17,7 @@
 EGroupware 23.1 can be installed via Docker, in fact the DEB/RPM packages also does that. Instructions on how to run EGroupware in Docker are in our [Wiki](https://github.com/EGroupware/egroupware/wiki/Docker-compose-installation) and in [doc/docker](https://github.com/EGroupware/egroupware/tree/23.1/doc/docker) subdirectory.
 
 ### Installing EGroupware development version via Docker:
-* this is the prefered developer installation, as it contains eg. a push-server container
+* this is the preferred developer installation, as it contains eg. a push-server container
 * https://github.com/EGroupware/egroupware/tree/master/doc/docker/development
 
 ### Deprecated EGroupware development installation:
@@ -49,11 +49,11 @@ cd /path/to/your/egroupware
 setup/setup-cli.php # will tell you if a schema-update is necessary
 ```
 install-cli.php supports the following "channels":
-- release: taged maintenance releases only eg. 19.1.20200701
+- release: tagged maintenance releases only eg. 19.1.20200701
 - bugfix:  release-branch incl. latest bugfixes eg. 20.1, if you are currently on 20.1.20200710
 - \<branch\>: switch to given branch 
 - master:  latest development for next release
 
 To change the channel, call ```install-cli.php <channel-to-update-to>```.
 
-For further instalation instructions see our wiki.
+For further installation instructions see our wiki.
diff --git a/about.php b/about.php
index 5815a9e8cf..65dd48a052 100644
--- a/about.php
+++ b/about.php
@@ -1,6 +1,6 @@
 <?php
 /**
- * EGroupware: About informations
+ * EGroupware: About information
  *
  * rewrite of the old PHPLib based about page
  * it now uses eTemplate2
diff --git a/composer.json b/composer.json
index d85ef71833..d6ebb32aee 100644
--- a/composer.json
+++ b/composer.json
@@ -35,7 +35,7 @@
 		"forum": "https://help.egroupware.org",
 		"wiki": "https://wiki.egroupware.org",
 		"source": "https://github.com/egroupware/egroupware",
-		"issuses": "https://my.egroupware.org"
+		"issues": "https://my.egroupware.org"
 	},
 	"repositories": [
 		{
diff --git a/groupdav.htaccess b/groupdav.htaccess
index d26a4b6e1d..a7224afe47 100755
--- a/groupdav.htaccess
+++ b/groupdav.htaccess
@@ -1,7 +1,7 @@
 # EGroupware CalDav/CardDAV and ActiveSync support via .htaccess
 #
 # Please note:
-# - this file needs to be copyied as .htaccess to your document root
+# - this file needs to be copied as .htaccess to your document root
 #   to support CalDAV/CardDAV or ActiveSync synchronisation.
 # - your Apache web server needs to be setup to read .htaccess files and
 #   allow use of the RewriteEngine directive (AllowOverride FileInfo).
diff --git a/header.inc.php.template b/header.inc.php.template
index 3ec4054b8c..1b49ad5c80 100644
--- a/header.inc.php.template
+++ b/header.inc.php.template
@@ -8,14 +8,14 @@
  * @link http://www.egroupware.org
  * @license http://opensource.org/licenses/gpl-license.php GPL - GNU General Public License
  * @author RalfBecker@outdoor-training.de
- * (This file was originaly written by Dan Kuykendall)
+ * (This file was originally written by Dan Kuykendall)
  * @version $Id$
  */
 
 // eGW install dir, need to be changed if you copy the server to an other directory
 define('EGW_SERVER_ROOT','{SERVER_ROOT}');
 
-// other pathes depending on the one above
+// other paths depending on the one above
 define('EGW_INCLUDE_ROOT',EGW_SERVER_ROOT);
 define('EGW_API_INC',EGW_INCLUDE_ROOT.'/phpgwapi/inc');
 
diff --git a/install-cli.php b/install-cli.php
index f7edf34e2d..328501d8ca 100755
--- a/install-cli.php
+++ b/install-cli.php
@@ -22,7 +22,7 @@
  * Both will create a git clone, which can be further updated by calling this tool without argument.
  *
  * We currently use 3 "channels":
- * - release: taged maintenance releases only eg. 17.1.20190214
+ * - release: tagged maintenance releases only eg. 17.1.20190214
  * - bugfix:  release-branch incl. latest bugfixes eg. 17.1 or 17.1.x-dev for composer
  * - master:  latest development for next release
  * To change the channel, call install-cli.php <channel-to-update-to>.
@@ -41,9 +41,9 @@
  * @license http://opensource.org/licenses/gpl-license.php GPL - GNU General Public License
  */
 
-chdir(__DIR__);	// to enable relative pathes to work
+chdir(__DIR__);	// to enable relative paths to work
 
-if (php_sapi_name() !== 'cli')	// security precaution: forbit calling setup-cli as web-page
+if (php_sapi_name() !== 'cli')	// security precaution: forbid calling setup-cli as web-page
 {
 	die('<h1>install-cli.php must NOT be called as web-page --> exiting !!!</h1>');
 }
@@ -324,7 +324,7 @@ exit(count($failed));
 /**
  * Run a command and collect number of succieded or failed command
  *
- * @param string $cmd comamnd to run
+ * @param string $cmd command to run
  * @param string $name task name to report on failure
  * @return int exit code of command
  */
@@ -381,7 +381,7 @@ function run_git(array $argv, $main_too=true)
 /**
  * Get the latest release
  *
- * @param boolean $prerelease =false include releases taged as prerelease
+ * @param boolean $prerelease =false include releases tagged as prerelease
  * @param boolean $return_name =true true: just return name, false: full release object
  * @return array|string|null null if no release found
  */
diff --git a/login.php b/login.php
index 4f19bfe658..52482486be 100755
--- a/login.php
+++ b/login.php
@@ -79,7 +79,7 @@ if (($GLOBALS['sessionid'] = Api\Auth::login()))
 }
 else
 {
-	// allow template to overide login-template (without modifying header.inc.php) by setting default or forced pref
+	// allow template to override login-template (without modifying header.inc.php) by setting default or forced pref
 	$prefs = new Api\Preferences();
 	$prefs->account_id = Api\Preferences::DEFAULT_ID;
 	$prefs->read_repository();
@@ -180,7 +180,7 @@ else
 		}
 	}
 
-	// use HTTP status code 401 for a failed login, so tools like fail2ban can recognice that for login page too
+	// use HTTP status code 401 for a failed login, so tools like fail2ban can recognize that for login page too
 	if ($_GET['cd'] == Api\Session::CD_BAD_LOGIN_OR_PASSWORD)
 	{
 		http_response_code(401);
diff --git a/service-worker.js b/service-worker.js
index 7069a3a2e3..9d1d3d0736 100644
--- a/service-worker.js
+++ b/service-worker.js
@@ -8,5 +8,5 @@
  */
 
 this.addEventListener('fetch', function (event) {
-    // temporary just to ommit error app not installable
+    // temporary just to omit error app not installable
 });
\ No newline at end of file