Japanese tend to think it's morally correct to get married before you have kids.
Most Japanese people don't think it's right to have kids before you get married.
ーJapanese tend to think it's morally correct to get married before you have kids.
「日本人は結婚してから子供を持つのが道徳的に正しいと考えがちだ。」
tend to で「〜しがちだ・どちらかといえば〜だ」
morally correct で「道徳的に正しい」
get married で「結婚する」
ーMost Japanese people don't think it's right to have kids before you get married.
「たいていの日本人は結婚前に子供を持つのは正しいと思わない。」
don't think it's right to ... 「…するのを正しいと思わない」のように逆の言い方もできます。
ご参考まで!