Kau harus memperhitungkan fakta itu.

You should emphasize that fact.“Memperhitungkan” means “to calculate/estimate”, “to figure out” or “to take into account”. The root word is “hitung” (to count). It doesn’t mean “to emphasize”.The English sentence was mistranslated in Japanese first. And then, it caused another mistranslation in Indonesian…I think “menekankan” better matches with “to emphasize”.