Why should a Japanese learn interlingua?
The simple answer to that question is:
Because Interlingua is the international vocabulary that is
c o m m o n to all languages that have their origin in Europe, and that its very simple grammar is a reflexion of a general European grammar. Learning Interlingua is the easiest way tho acquire the vocabulary useful when learning other European languages.
The explanation to this is that one of the Indo-European languages, Latin, which was the language of the Roman Empire 2000 years ago, continued to serve as the means of communication between all...