#include <MsgBoxConstants.au3> ; to declare the Constants of MsgBox
Local $sRegex = "(?i)\b(t)(?:anks *(?=[.?!]\n|to|for|in|ever)|[han]{3}([ks]{2}|x)+|hx|anx)\b"
Local $sString = "Fix:" & @CRLF & _
"" & @CRLF & _
"thx 28,227 results " & @CRLF & _
"thanx 12,147" & @CRLF & _
"Tanks 1,087 <-- may actually mean _tanks_." & @CRLF & _
" tanks in advance" & @CRLF & _
" tanks everyone" & @CRLF & _
" tanks for the help" & @CRLF & _
" Tanks!" & @CRLF & _
"thansk 518" & @CRLF & _
"tanx 125" & @CRLF & _
"tahnks 97" & @CRLF & _
"" & @CRLF & _
"" & @CRLF & _
"Leave alone:" & @CRLF & _
"" & @CRLF & _
"thank you" & @CRLF & _
"tank, tanks of acid," & @CRLF & _
"task, tasks" & @CRLF & _
"Suppose there is a production line with 8 tanks: each filled with a different substance for parts to be dipped in. The parts will be dropped into tanks by a crane along side the tanks. (http://stackoverflow.com/questions/25062870/)"
Local $sSubst = "$1hanks"
Local $sResult = StringRegExpReplace($sString, $sRegex, $sSubst)
MsgBox($MB_SYSTEMMODAL, "Result", $sResult)
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for AutoIt, please visit: https://www.autoitscript.com/autoit3/docs/functions/StringRegExp.htm