 Ido is what is called "schematic" (easier to learn for speakers of very different languages), whereas Interlingua is what is called "naturalistic" (easier to understand for speakers of related languages).While both languages have a majority of Latin/Romance words in their lexicons, Ido has a somewhat larger number of Germanic and Slavic words, so it could be suggested that Ido is more internationally neutral.Germanic and Slavic words in Interlingua are often Romanized.