interlingua

So he has adopted a kind of baseball interlingua.

"Why not, say, Nov-Esperanto, or Ido, or Interlingua?"

“That’s a highly inflected version of early Interlingua, Captain,” Mannion said.

“Try translating into old Interlingua, adding their sound changes, and then feeding their own rise-and-fall routine to it,” I said.

And they were canny enough to use an old form of Interlingua; somewhere they’d met men before.