diff --git a/ChangeLog.md b/ChangeLog.md
index c54b5da1..8475f61d 100644
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -408,7 +408,7 @@ In detail, these are:
 
 ### awaystore
 
-* Fix loading old configs which refered to "away" module
+* Fix loading old configs which referred to "away" module
 * Fix displaying IPv6 addresses
 
 ### crypt
@@ -899,7 +899,7 @@ To fix this, remove any user:pass@host portions from your bookmarks, remove all
 * Moved some modules into/out of extra. (r1919) (r1922) (r1923)
 * Added ./configure --enable-run-from-script, without it ZNC will no longer look for modules in ./modules/. (r1927) (r1928) (r2001)
 * Made a dedicated page to confirm user deletion in webadmin. (r1937) (r1939) (r1941) (r1943)
-* Use spaces for seperating ip addresses from ports. (r1955)
+* Use spaces for separating ip addresses from ports. (r1955)
 * ZNC's built-in MOTD now goes through ExpandString. (r1956)
 * Check for root before generating a new config file. (r1988)
 * Added a flag for adding irc-only / http-only ports via /znc addport. (r1990) (r1992)
@@ -1400,7 +1400,7 @@ Thanks to cnu for finding and reporting this bug.
 * Add ShowMOTD and reorder the HELP output of *status. (r1175)
 * Add /msg *status restart . Thanks to kroimon. (r1174)
 * Make --makeconf more userfriendly. Thanks to kroimon. (r1173)
-* Dont start a new znc process after --makeconf. Thanks to kroimon. (r1171)
+* Don't start a new znc process after --makeconf. Thanks to kroimon. (r1171)
 * Add CModule::PutModule(const CTable&). (r1168) (r1169)
 * Unify some preprocessor macros in Modules.cpp. (r1166)
 * Catch a throw UNLOAD from CModule::OnLoad(). (r1164)
diff --git a/Doxyfile b/Doxyfile
index 2d91051d..89c9e21f 100644
--- a/Doxyfile
+++ b/Doxyfile
@@ -1665,7 +1665,7 @@ UML_LOOK               = NO
 # the class node. If there are many fields or methods and many nodes the
 # graph may become too big to be useful. The UML_LIMIT_NUM_FIELDS
 # threshold limits the number of items for each type to make the size more
-# managable. Set this to 0 for no limit. Note that the threshold may be
+# manageable. Set this to 0 for no limit. Note that the threshold may be
 # exceeded by 50% before the limit is enforced.
 
 UML_LIMIT_NUM_FIELDS   = 10
diff --git a/README.md b/README.md
index c7526f2e..4c8e3f3e 100644
--- a/README.md
+++ b/README.md
@@ -33,7 +33,7 @@ Core:
 SSL/TLS support:
 * openssl 0.9.7d or later
     * try installing openssl-dev, openssl-devel or libssl-dev
-    * Mac OS X: OpenSSL from Homebrew is prefered over system
+    * Mac OS X: OpenSSL from Homebrew is preferred over system
 
 modperl:
 * perl and its bundled libperl
diff --git a/include/znc/Modules.h b/include/znc/Modules.h
index 22c44917..64d7196f 100644
--- a/include/znc/Modules.h
+++ b/include/znc/Modules.h
@@ -510,7 +510,7 @@ class CModule {
      *  @param sPass The server password that will be used.
      *  @param sNick The nick that will be used.
      *  @param sIdent The protocol identity that will be used. This is not
-     *                the ident string that is transfered via e.g. oidentd!
+     *                the ident string that is transferred via e.g. oidentd!
      *  @param sRealName The real name that will be used.
      *  @return See CModule::EModRet.
      */
diff --git a/include/znc/ZNCString.h b/include/znc/ZNCString.h
index cd08b809..9ab0f631 100644
--- a/include/znc/ZNCString.h
+++ b/include/znc/ZNCString.h
@@ -326,7 +326,7 @@ class CString : public std::string {
     /** Split up this string into tokens.
      * Via sLeft and sRight you can define "markers" like with Replace().
      * Anything in such a marked section is treated as a single token. All
-     * occurences of sDelim in such a block are ignored.
+     * occurrences of sDelim in such a block are ignored.
      * @param sDelim Delimiter between tokens.
      * @param vsRet Vector for returning the result.
      * @param bAllowEmpty Do empty tokens count as a valid token?
@@ -453,37 +453,37 @@ class CString : public std::string {
     /** @return The numerical value of this string similar to atoi(). */
     double ToDouble() const;
 
-    /** Trim this string. All leading/trailing occurences of characters from
+    /** Trim this string. All leading/trailing occurrences of characters from
      *  s are removed.
      * @param s A list of characters that should be trimmed.
      * @return true if this string was modified.
      */
     bool Trim(const CString& s = " \t\r\n");
-    /** Trim this string. All leading occurences of characters from s are
+    /** Trim this string. All leading occurrences of characters from s are
      *  removed.
      * @param s A list of characters that should be trimmed.
      * @return true if this string was modified.
      */
     bool TrimLeft(const CString& s = " \t\r\n");
-    /** Trim this string. All trailing occurences of characters from s are
+    /** Trim this string. All trailing occurrences of characters from s are
      *  removed.
      * @param s A list of characters that should be trimmed.
      * @return true if this string was modified.
      */
     bool TrimRight(const CString& s = " \t\r\n");
-    /** Trim this string. All leading/trailing occurences of characters from
+    /** Trim this string. All leading/trailing occurrences of characters from
      *  s are removed. This CString instance is not modified.
      * @param s A list of characters that should be trimmed.
      * @return The trimmed string.
      */
     CString Trim_n(const CString& s = " \t\r\n") const;
-    /** Trim this string. All leading occurences of characters from s are
+    /** Trim this string. All leading occurrences of characters from s are
      *  removed. This CString instance is not modified.
      * @param s A list of characters that should be trimmed.
      * @return The trimmed string.
      */
     CString TrimLeft_n(const CString& s = " \t\r\n") const;
-    /** Trim this string. All trailing occurences of characters from s are
+    /** Trim this string. All trailing occurrences of characters from s are
      *  removed. This CString instance is not modified.
      * @param s A list of characters that should be trimmed.
      * @return The trimmed string.
diff --git a/modules/keepnick.cpp b/modules/keepnick.cpp
index 6c76abcd..daa9f225 100644
--- a/modules/keepnick.cpp
+++ b/modules/keepnick.cpp
@@ -141,7 +141,7 @@ class CKeepNickMod : public CModule {
     }
 
     EModRet OnUserRaw(CString& sLine) override {
-        // We dont care if we are not connected to IRC
+        // We don't care if we are not connected to IRC
         if (!GetNetwork()->IsIRCConnected()) return CONTINUE;
 
         // We are trying to get the config nick and this is a /nick?
diff --git a/modules/modtcl/binds.tcl b/modules/modtcl/binds.tcl
index c243b4c1..723a0676 100644
--- a/modules/modtcl/binds.tcl
+++ b/modules/modtcl/binds.tcl
@@ -151,7 +151,7 @@ namespace eval Binds {
 			}
 		}
 		if {!$match} {
-			PutModule "Error, dcc trigger '[string range [lindex $text 0] 1 end]' doesnt exist"
+			PutModule "Error, dcc trigger '[string range [lindex $text 0] 1 end]' doesn't exist"
 		}
 	}
 }
diff --git a/modules/modtcl/modtcl.tcl b/modules/modtcl/modtcl.tcl
index 9aa30292..c21b905b 100644
--- a/modules/modtcl/modtcl.tcl
+++ b/modules/modtcl/modtcl.tcl
@@ -128,4 +128,4 @@ proc matchattr {handle flags {channel ""}} {return 0}
 source [file dirname $::MasterFile]/binds.tcl
 
 
-PutModule "Succesfully loaded modtcl with master file: [info script]"
+PutModule "Successfully loaded modtcl with master file: [info script]"
diff --git a/modules/watch.cpp b/modules/watch.cpp
index a9bbdd70..e37fbb48 100644
--- a/modules/watch.cpp
+++ b/modules/watch.cpp
@@ -708,7 +708,7 @@ class CWatcherMod : public CModule {
     }
 
     void Load() {
-        // Just to make sure we dont mess up badly
+        // Just to make sure we don't mess up badly
         m_lsWatchers.clear();
 
         bool bWarn = false;
diff --git a/src/IRCSock.cpp b/src/IRCSock.cpp
index da9ce738..eb6aa605 100644
--- a/src/IRCSock.cpp
+++ b/src/IRCSock.cpp
@@ -938,7 +938,7 @@ bool CIRCSock::OnNumericMessage(CNumericMessage& Message) {
         }
         case 451:
             // :irc.server.com 451 CAP :You have not registered
-            // Servers that dont support CAP will give us this error, dont send
+            // Servers that don't support CAP will give us this error, don't send
             // it to the client
             if (sNick.Equals("CAP")) return true;
         case 470: {
diff --git a/src/Modules.cpp b/src/Modules.cpp
index f4079bf4..6caddd73 100644
--- a/src/Modules.cpp
+++ b/src/Modules.cpp
@@ -31,7 +31,7 @@ bool ZNC_NO_NEED_TO_DO_ANYTHING_ON_MODULE_CALL_EXITER;
 
 #ifndef RTLD_LOCAL
 #define RTLD_LOCAL 0
-#warning "your crap box doesnt define RTLD_LOCAL !?"
+#warning "your crap box doesn't define RTLD_LOCAL !?"
 #endif
 
 #define MODUNLOADCHK(func)                              \
diff --git a/src/WebModules.cpp b/src/WebModules.cpp
index d1ebf491..b9bf435a 100644
--- a/src/WebModules.cpp
+++ b/src/WebModules.cpp
@@ -195,7 +195,7 @@ void CWebAuth::RefusedLogin(const CString& sReason) {
             m_pWebSock->AddHeader("WWW-Authenticate", "Basic realm=\"ZNC\"");
             m_pWebSock->CHTTPSock::PrintErrorPage(
                 401, "Unauthorized",
-                "HTTP Basic authentication attemped with invalid credentials");
+                "HTTP Basic authentication attempted with invalid credentials");
             // Why CWebSock makes this function protected?..
         } else {
             m_pWebSock->Redirect("/?cookie_check=true");
@@ -509,7 +509,7 @@ CWebSock::EPageReqResult CWebSock::PrintStaticFile(const CString& sPath,
     SetPaths(pModule);
     CString sFile = m_Template.ExpandFile(sPath.TrimLeft_n("/"));
     DEBUG("About to print [" + sFile + "]");
-    // Either PrintFile() fails and sends an error page or it suceeds and
+    // Either PrintFile() fails and sends an error page or it succeeds and
     // sends a result. In both cases we don't have anything more to do.
     PrintFile(sFile);
     return PAGE_DONE;
diff --git a/src/znc.cpp b/src/znc.cpp
index 3d77feac..616ec25b 100644
--- a/src/znc.cpp
+++ b/src/znc.cpp
@@ -1042,7 +1042,7 @@ bool CZNC::ReadConfig(CConfig& config, CString& sError) {
     CUtils::PrintStatus(true);
 
     // check if config is from old ZNC version and
-    // create a backup file if neccessary
+    // create a backup file if necessary
     CString sSavedVersion;
     config.FindStringEntry("version", sSavedVersion);
     if (sSavedVersion.empty()) {
@@ -1782,7 +1782,7 @@ bool CZNC::AddListener(CConfig* pConfig, CString& sError) {
 
 bool CZNC::AddListener(CListener* pListener) {
     if (!pListener->GetRealListener()) {
-        // Listener doesnt actually listen
+        // Listener doesn't actually listen
         delete pListener;
         return false;
     }