> If any of the intentionally designed languages were to actually come into common use, it would immediately be subject to the same kind of regional pronunciation differences, usage drift over time, coining of neologisms and idiomatic phrases, etc. that make real languages so complicated.
The drift would probably be much smaller than historically, because now we have the internet and global culture. And the common language would make the world even more connected.
If Esperanto would come into common use tomorrow, Hollywood would start producing movies in Esperanto, and people around the world would be watching them. That would already be a force acting against local drift. If people around you decide to replace X by Y, but 9 out of 10 movies keep using X, the change is less likely to stick.
Neologisms and idioms, I agree, but there is a chance they would spread to other countries.
The drift would probably be much smaller than historically, because now we have the internet and global culture. And the common language would make the world even more connected.
If Esperanto would come into common use tomorrow, Hollywood would start producing movies in Esperanto, and people around the world would be watching them. That would already be a force acting against local drift. If people around you decide to replace X by Y, but 9 out of 10 movies keep using X, the change is less likely to stick.
Neologisms and idioms, I agree, but there is a chance they would spread to other countries.