OET interlinear YHN (JHN) 7:51

uW Translation Notes:

Note 1 topic: figures-of-speech / rquestion

μὴ ὁ νόμος ἡμῶν κρίνει τὸν ἄνθρωπον, ἐὰν μὴ ἀκούσῃ πρῶτον παρ’ αὐτοῦ, καὶ γνῷ τί ποιεῖ?

(Some words not found in SR-GNT: Μή ὁ νόμος ἡμῶν κρίνει τόν ἄνθρωπον ἐάν μή ἀκούσῃ πρῶτον πάρʼ αὐτοῦ καί γνῷ τί ποιεῖ)

Nicodemus is using the form of a question to add emphasis. If it would be helpful in your language, you could express this type of question by translating his words as a statement or an exclamation and communicate the emphasis in another way. Alternate translation: [Our law certainly does not judge a man unless it might first hear from him and might know what he does!]

Note 2 topic: figures-of-speech / personification

μὴ ὁ νόμος ἡμῶν κρίνει τὸν ἄνθρωπον, ἐὰν μὴ ἀκούσῃ πρῶτον παρ’ αὐτοῦ, καὶ γνῷ τί ποιεῖ

(Some words not found in SR-GNT: Μή ὁ νόμος ἡμῶν κρίνει τόν ἄνθρωπον ἐάν μή ἀκούσῃ πρῶτον πάρʼ αὐτοῦ καί γνῷ τί ποιεῖ)

Nicodemus speaks of the law as if it were a person. If this use of law is not natural in your language, you could express this meaning plainly. Alternate translation: [It is not written in our law that we may judge a man unless we might first hear from him and might know what he does, is it]

Note 3 topic: figures-of-speech / genericnoun

τὸν ἄνθρωπον

(Some words not found in SR-GNT: Μή ὁ νόμος ἡμῶν κρίνει τόν ἄνθρωπον ἐάν μή ἀκούσῃ πρῶτον πάρʼ αὐτοῦ καί γνῷ τί ποιεῖ)

Here, a man does not refer to a specific man. It refers to any man in general. Alternate translation: [any man]