YES: The world will gain in many ways if everyone spoke the same language.
A universal language would help grow the global economy as previously inaccessible markets with different dominant languagesare now easier to enter for both workers and corporations.
Connectedness between individuals may significantly increase and deepen as the easing of language barriers allow communication between individuals with common interests but different nationalities.
A truly international civic society can conceivably be formed as activists with common causes rally more easily across national borders and present comprehensive programs to address collective social, political and environmental challenges.
Many desirable practices and products in arts and culture can now be shared seamlessly across societies, promoting a truly global society united by common trends, fads and terms of reference.
NO: The world will lose in many ways if everyone spoke the same language.
Some industries and sectors that thrive on linguistic diversity, such as foreign language instruction, may suffer a sharp decline in demand for their products and services.
Within national borders, more effort will have to be made by both individuals and societies to either stem the inevitable loss or erosion of native languages over time or promote their continued relevance, as monolinguistically inclined individuals marginalize them.
The reverse of civic society organizations is found in subversive ones, such as terrorist groups and crime syndicates, which find it easier to collaborate on their activities with a common language and terms of reference, potentially raising the scope and damage caused by international terrorism and trans-border crime.
The beauty of many art and cultural products or practices, such as music, rests in their unique language traditions and their translation into a common language will inevitably dilute their original appeal or render them ineffective in pleasing our aesthetic sensibilities.