Comment Its called math (Score 1) 626
Take out the ambiguities of linguistics and you need to remove the ability for it to evolve. The perfect language you seek is math. The issue is the limit of what it can honestly convey.
Look at Esperanto and the wide adoption it has amassed over the last 50 years. Follow their successfukl formula and you should have something less universal than pig latin. With universal translators, the need of a universal language is falling out of necessity more rapidly than adopting a new one for the world will be able to outpace.