per quanto riguarda significa in inglese

as regards▼(regarding)
preposition
[UK: əz rɪ.ˈɡɑːdz ˈsʌm.θɪŋ] [US: ˈæz rɪ.ˈɡɑːrdz ˈsʌm.θɪŋ]

concerning▼(regarding)
preposition
[UK: kən.ˈsɜːn.ɪŋ] [US: kən.ˈsɝːn.ɪŋ]

with regard to▼(concerning)
preposition
[UK: wɪð rɪ.ˈɡɑːd tuː ˈsʌm.θɪŋ] [US: wɪθ rə.ˈɡɑːrd ˈtuː ˈsʌm.θɪŋ]

with respect to▼(pertaining to)
preposition
[UK: wɪð rɪ.ˈspekt tuː] [US: wɪθ rə.ˈspekt ˈtuː]