linguoboy wrote:It's hard to make predictions, particularly about the future. Characters have been extremely resilient, but that doesn't mean their general use is guaranteed forever. I think that--even more so than pronunciation features (such as tones)--they are the major obstacle to the acceptance of Chinese as a true global lingua franca.
Perhaps, but also perhaps not. As you have said yourself, it is difficult to make predictions about the future.
What makes a language the lingua franca is the country that uses it, namely how wealthy and military powerful it is. Whether how "easy" the language is to learn by most people obviously plays a role but a distance second to the ones mentioned earlier.
Whether in terms or pronunciation, grammar or logic behind the written script, English is far from being the easiest. Yet somehow it is the lingua franca today. This is due to two centuries of first British then American dominance over the world. Prior to English, it was French, and French was not "easier" than English to learn either.
Prior to the late 1800's, Chinese was in fact the lingua franca of the Sinosphere. Even when East Asian nations communicate with each other, they used Chinese. A common example would be the letter written by Kublai Khan to the king of Japan at that time. One interesting note about this letter is that Chinese remained the lingua franca after China was conquered by the Mongols.
So until a more dominant foreign power entered East Asia, Chinese was already the lingua franca for thousands of years. So why is it unlikely that it become the lingua franca again assuming China has the military and economical might to back it up?
IMHO, the true obstacle of Chinese being the next lingua franca is not the language itself, it's how to dethrone United States as the global dominant power.