diff --git a/PowerEditor/installer/nativeLang/english.xml b/PowerEditor/installer/nativeLang/english.xml
index 0c001b3f..c11b6378 100644
--- a/PowerEditor/installer/nativeLang/english.xml
+++ b/PowerEditor/installer/nativeLang/english.xml
@@ -1268,7 +1268,7 @@ Find in all files except exe, obj && log:
             <summary-nbsel2 value=" bytes) in "/>
             <summary-nbrange value=" ranges"/>
             <multi-edge-radio-tip value="Add your column marker by indicating its position with a decimal number.
-You can define several column markers by using white space to seperate the different numbers."/>
+You can define several column markers by using white space to separate the different numbers."/>
         </MiscStrings>
     </Native-Langue>
 </NotepadPlus>
diff --git a/PowerEditor/src/TinyXml/tinyXmlA/tinyxmlerrorA.cpp b/PowerEditor/src/TinyXml/tinyXmlA/tinyxmlerrorA.cpp
index 51302660..98259862 100644
--- a/PowerEditor/src/TinyXml/tinyXmlA/tinyxmlerrorA.cpp
+++ b/PowerEditor/src/TinyXml/tinyXmlA/tinyxmlerrorA.cpp
@@ -25,7 +25,7 @@ distribution.
 
 #include "tinyxmlA.h"
 
-// The goal of the seperate error file is to make the first
+// The goal of the separate error file is to make the first
 // step towards localization. tinyxml (currently) only supports
 // latin-1, but at least the error messages could now be translated.
 //
diff --git a/PowerEditor/src/TinyXml/tinyxmlerror.cpp b/PowerEditor/src/TinyXml/tinyxmlerror.cpp
index 717cfb9d..0d47f9ee 100644
--- a/PowerEditor/src/TinyXml/tinyxmlerror.cpp
+++ b/PowerEditor/src/TinyXml/tinyxmlerror.cpp
@@ -25,7 +25,7 @@ distribution.
 
 #include "tinyxml.h"
 
-// The goal of the seperate error file is to make the first
+// The goal of the separate error file is to make the first
 // step towards localization. tinyxml (currently) only supports
 // latin-1, but at least the error messages could now be translated.
 //
diff --git a/PowerEditor/src/WinControls/Preference/preferenceDlg.cpp b/PowerEditor/src/WinControls/Preference/preferenceDlg.cpp
index f4be8af4..b72915da 100644
--- a/PowerEditor/src/WinControls/Preference/preferenceDlg.cpp
+++ b/PowerEditor/src/WinControls/Preference/preferenceDlg.cpp
@@ -664,7 +664,7 @@ void MarginsDlg::initScintParam()
 	::EnableWindow(::GetDlgItem(_hSelf, IDC_COLUMNPOS_EDIT), isEnable && isCheckedOrNot(IDC_RADIO_MULTILNMODE));
 	
 	NativeLangSpeaker *pNativeSpeaker = (NppParameters::getInstance()).getNativeLangSpeaker();
-	generic_string radioboxTip = pNativeSpeaker->getLocalizedStrFromID("multi-edge-radio-tip", TEXT("Add your column marker by indicating its position with a decimal number.\nYou can define several column markers by using white space to seperate the different numbers."));
+	generic_string radioboxTip = pNativeSpeaker->getLocalizedStrFromID("multi-edge-radio-tip", TEXT("Add your column marker by indicating its position with a decimal number.\nYou can define several column markers by using white space to separate the different numbers."));
 	_multiEdgeTip = CreateToolTip(IDC_RADIO_MULTILNMODE, _hSelf, _hInst, const_cast<PTSTR>(radioboxTip.c_str()));
 
 	oldFunclstToolbarProc = reinterpret_cast<WNDPROC>(::SetWindowLongPtr(::GetDlgItem(_hSelf, IDC_COLUMNPOS_EDIT), GWLP_WNDPROC, reinterpret_cast<LONG_PTR>(editNumSpaceProc)));