"Keburukan seseorang tidak perlu diketahui semua orang."

Translation: Someone's ugliness does not need to be known by everyone.

[Jake929031]

Ugliness implies apperence and therefore makes no sense with the rest of the sentence.

[setijoso]

It should be "someone's flaws" not "someone's ugliness"

[Rick392366]

flaw = kekurangan

[bvcandra]

In English, "ugliness" is more often used to talk about appearances. The word "keburukan" is used more often to talk about characters and thus translates more accurately to "flaws" in English.

[Angela927992]

I wrote failings

[Rick392366]

Aha...okay...do you have another alternative as well ?
I would translate 'someone's flaws' as 'kekurangan seseorang'.
I think 'flaw' is too mild as a translation for 'keburukan'.
How about: 'badness', 'evilness', 'foulness', 'nastiness', 'wickedness', or something similar?
Or does that sound strange in English ?

[bvcandra]

I think 'wickedness' sounds quite right

[SonMai16]

Should "The evil of one person is not necessarily known by everyone" be acceptable here?