What does the Quran say about speech?

“Speak the Truth.” [Al-Quran,3:17]

“Speak straight.” [Al-Quran,33:70]

“Speak justice.” [Al Quran,6:152]

“Speak kindly.” [Al-Quran,2:83]

“Speak politely.” [Al-Qur’an,17:53]

“Speak fairly.” [Al-Quran,17:28]

“Speak gently. [Al-Quran,20:44]

“Speak graciously.” [Al-Quran,17:23]

“Speak not in vain.” [Al-Quran,23:3]

“Speak no lie.” [Al-Quran,22:30]”