Making du'aa' in prayer in a language other than Arabic

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Check below answers in case you are looking for other related questions:
Can the same soorah be repeated in prayer?
He used not to recite al-Faatihah behind the imam; should he repeat those prayers?

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Related Answers:
They got a shock when their imaam recited al-Faatihah in English
The imam always recites in Fajr prayer the beginning of Soorat al-Kahf and the end of Soorat al-Jumu ‘ah. What is the ruling on that?
If the imam recites for too long in a prayer in which Qur’aan is recited silently, what should the one who is praying behind him do?
Can the same soorah be repeated in prayer?
He used not to recite al-Faatihah behind the imam; should he repeat those prayers?

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