#include <StringConstants.au3> ; to declare the Constants of StringRegExp
#include <Array.au3> ; UDF needed for _ArrayDisplay and _ArrayConcatenate
Local $sRegex = "(?m)(?>\p{Lu}+?\s?)+\(?\p{Lu}+\)?\K(:)|(?<!\w)(\s)(?=\p{Lu}{2,})"
Local $sString = "this is a speech text. FIRST PERSON: hi all, thank you for coming. SECOND PERSON: thank you for inviting us. TERCER PERSONA QUE SE LLAMA ANDRÉS: soy de: acuerdo. CUARTA PERSONA (JOHN): Hi. How are you? ANDRÉS: Hola buenos días!"
Local $aArray = StringRegExp($sString, $sRegex, $STR_REGEXPARRAYGLOBALFULLMATCH)
Local $aFullArray[0]
For $i = 0 To UBound($aArray) -1
_ArrayConcatenate($aFullArray, $aArray[$i])
Next
$aArray = $aFullArray
; Present the entire match result
_ArrayDisplay($aArray, "Result")
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