Meaning, category and verb ending must agree.
● Do not use مَنْ when the missing meaning is a place; choose أَيْنَ or the contextually suitable form.
● Do not translate مَتَى as “wherever”; it points to time.
● Do not leave the two imperfect verbs in their ordinary nominative forms. Write مَنْ يَرْحَمْ يُرْحَمْ, not مَنْ يَرْحَمُ يُرْحَمُ.