Prophet Hud - 11:25 "We sent Noah to his people: "Verily, I am a warner for you, clear."
Why does Allah choose the messenger from among the people to whom He sends the message?
Prophet Abraham/14:4 We send every messenger only in the language of his people so that he may make them aware. Allah leads astray whom He wills and guides whom He wills. He is Mighty, Wise.

Explained in Detail/41:44 "Had We made it a Qur´an in a foreign language, they would have said, "Should not its verses have been explained?"Whether in a foreign language or in Arabic, say, "It is a guide and a cure for those who believe (regardless of their language). As for those who do not believe, their ears are heavy. It is closed to them as if it were addressed to them from a distant place."

The Smoke/44:58 We have made it easy in your language that they may take admonition.

The Sandhills/46:12 Before that the Book of Moses was a guide and a mercy. This is a confirming Book sent down in Arabic to warn the wrongdoers and as good tidings to those who do good.

Prophet Joseph/12:2 We have sent it down as an Arabic Qur´an so that you may understand.

The Thunder/13:37 So We sent it down as an Arabic law. If you follow their pleasure after the knowledge that has come to you, you will have no friend or protector against Allah.

Mary/19:97 We have made it easy with your tongue, that you may give glad tidings with it to the righteous and warn the stubborn people.

Ta-Ha/20:113 So We have sent it down as a Qur´an in Arabic, and We have explained in it the news of the future in various forms so that they may act righteously or it may be a reminder for them.

The Poets/26:193 The Trustworthy Spirit (Gabriel) has sent it down.
The Poets/26:194 Into your heart... That you may be one of the warners.
The Poets/26:196 It has also been mentioned in the previous Books.

The Companies/39:27 We have given mankind every kind of example in this Qur´an so that they may take admonition.
The Companies/39:28 A smooth Quran in Arabic, may they be righteous

Explained in Detail/41:3 It is a Book whose verses are explained as an Arabic Qur´an for a people who know.

The Ornaments of Gold/43:3 We have made it a Quran with a perfect language so that you may understand.