Apparently the need has not been filled by any of the laboratory products so far created to fill it.
And it is doubtful if it ever can be filled in this way.
An artificial language might serve some of the requirements of business and travel, but no one has proved willing to make it the medium of political, historical, or scientific thought, to say nothing of literature.
The history of language policy in the twentieth century makes it unlikely that any government will turn its resources to an international linguistic solution that benefits the particular country only indirectly.