RegEx for characters with accents and such but not alphanum or punctuation

I'm creating a fuction that checks for the following code snip. I'm having trouble understanding what I need to do to get the last criteria. How do I specifically check for characters with additional marks  such as   a'   but  not  a

Thanks in advance for any help or advice you might give

    <!---Contain characters from three of the following five categories:--->
         
            <!---English uppercase characters (A through Z)--->
   <cfif ReFind("[[:upper:]]+",passwd,0, false) gt 0>
    <cfset numCharSets = numCharSets + 1>
   </cfif>
           
            <!---English lowercase characters (a through z)--->
   <cfif ReFind("[[:lower:]]+",passwd,0, false) gt 0>
    <cfset numCharSets = numCharSets + 1>
   </cfif>
           
            <!---Base 10 digits (0 through 9)--->
   <cfif ReFind("[[:digit:]]+",passwd,0, false) gt 0>
    <cfset numCharSets = numCharSets + 1>
   </cfif>
           
            <!---Non-alphabetic characters (for example, !, $, #, %)--->
   <cfif ReFind("[[:punct:]]+",passwd,0, false) gt 0>
    <cfset numCharSets = numCharSets + 1>
   </cfif>
           
            <!---A catch-all category of any Unicode character that does not fall under the
      previous four categories. This fifth category can be regionally specific.--->