Io ha trovate un explication que es Interlingua:
http://www.kafejo.com/lingvoj/auxlangs/index.htm

Second best would probably be IALA Interlingua. Fewer people use it,
there are only a few organizations; some books are available. But it
does have a good presence on the Web, and it is fairly easy to read for
somebody who knows a Romance language, because the vocabulary consists
of words as they most commonly appear in the Romance languages. But its
grammar is much more complex than Esperanto's because

_it tries to embrace the grammars of all the Romance languages_

and retains many of their irregularities, so it is harder to write.

Hm..., un poco estranie these...
Pawel