1)People have long been interested in having one language that could be spoken throughout the world.
общий Have people been interested in having one language that could be spoken throughout the world?
специальный wHO has been interested in having one language that could be spoken throughout the world? Why have people been interested in having one language?
альтернативный Have people been interested in having one or two languages that could be spoken throughout the world?
разделительный People have long been interested in having one language that could be spoken throughout the world, haven*t they?
2)English is the most widespread languages on earth.
общий Is English the most widespread languages on earth?
специальный What language is the most widespread on earth? Why is English so popular?
альтернативный Is English or Spain the most widespread language on earth?
разделительный English is the most widespread languages on earth, isn*t it?