perl -MWin32::SAPI5 -MClass::Inspector -MData::Dumper -e "print Dumper \Class::Inspector->methods('Win32::SAPI5::SpVoice','expanded')"

[..]

# or 
perl -MWin32::SAPI5 -e "for (sort keys %Win32::SAPI5::SpVoice::){print qq($_\n) if exists &{qq(Win32::SAPI5::SpVoice::$_)}}"

# working
perl -MWin32::SAPI5 -e "$voice=Win32::SAPI5::SpVoice->new(); print for $voice->GetInstalledLanguages"
Italian (Italy)English (United States of America)

# NOT working
perl -MWin32::SAPI5 -e "$voice=Win32::SAPI5::SpVoice->new(); print for $voice->GetInstalledVoices"

# working pitch
perl -MWin32::SAPI5 -e "$voice=Win32::SAPI5::SpVoice->new(); $voice->Speak( q{ <pitch absmiddle='10'>This is a test.</pitch>})"

perl -MWin32::SAPI5 -e "$voice=Win32::SAPI5::SpVoice->new(); $voice->Speak( q{ <pitch absmiddle='-10'>This is a test.</pitch>})"

# working absspeed from -10 .. 10 ?
perl -MWin32::SAPI5 -e "$voice=Win32::SAPI5::SpVoice->new(); $voice->Speak( q{ <rate absspeed='-10'>this is some input text</rate>})"

# working silence and spelling
perl -MWin32::SAPI5 -e "$voice=Win32::SAPI5::SpVoice->new(); $voice->Speak( q{<silencemsec='500'/> <spell>UN</spell>})"


# working fortmat date
perl -MWin32::SAPI5 -e "$voice=Win32::SAPI5::SpVoice->new(); $voice->Speak( q{  <says-as interpret-as='date'> 4/12/1972   })"


#wondering if it works :)
perl -MWin32::SAPI5 -e "$voice=Win32::SAPI5::SpVoice->new(); $voice->Speak( q{           <prompt>If I want I can <prosody rate='+150%'>speed up the rate</prosody></prompt>   })"

# not working
perl -MWin32::SAPI5 -e "$voice=Win32::SAPI5::SpVoice->new(); $voice->Speak( q{           Today is <Context ID='date'>01/31/2023</Context>   })"

# working but not with text in front of tags
perl -MWin32::SAPI5 -e "$voice=Win32::SAPI5::SpVoice->new(); $voice->Speak( q{           <context ID = 'web_url'>www.perl.org</context> <context ID = 'time'>12:30</context> })"