Which country provided the international intellectual language of mid eighteenth century and was center cultural life?

The country that provided the international intellectual language of the mid-eighteenth century and was the center of cultural life was France.

Here's why:

* French Language: French was the dominant language of diplomacy, scholarship, and high society in Europe during this period. This was due to France's political and cultural influence.

* The Enlightenment: The Enlightenment, a period of intellectual and philosophical ferment, originated in France. French thinkers like Voltaire, Rousseau, and Montesquieu profoundly shaped the ideas of the era.

* Paris as a Center: Paris was a hub of artistic, literary, and scientific activity. It attracted intellectuals, artists, and writers from across Europe.

* French Academies: The French Academy, established in 1635, standardized the French language and promoted French literature. This further solidified French influence.

While other countries contributed significantly to the intellectual and cultural landscape of the mid-eighteenth century, France held a dominant position due to its language, its leading role in the Enlightenment, and its cultural dynamism.