Which poet of Sindh was called Poet of Haft Zaban?

Which poet of Sindh was called Poet of Haft Zaban?

سندھ کے کس شاعر کو شاعر ہفت زباں کہا جاتا تھا؟
Explanation

The poet of Sindh known as the "Poet of Haft Zaban" is "Sachal Sarmast."

He earned this title for his proficiency in writing poetry in seven languages.