gelijke kappen meaning in English

what's sauce for the goose is sauce for the gander▼(if something is acceptable for one person, it is acceptable for another)
phrase
[UK: ˈwɒts sɔːs fɔː(r) ðə ɡuːs ɪz sɔːs fɔː(r) ðə ˈɡæn.də(r)] [US: ˈhwʌts ˈsɒs ˈfɔːr ðə ˈɡuːs ˈɪz ˈsɒs ˈfɔːr ðə ˈɡæn.dər]