His mature works were devoted mainly to landscape painting, with a return to a late 19th-century naturalistic language.
Latino Sine Flexione, a second naturalistic auxiliary language, is also naturalistic in content but is no longer widely spoken.
At the 1926 Ido conference in Cassel, he startled many listeners by delivering a presentation on the naturalistic auxiliary language Occidental.
Some naturalistic languages do have a limited number of artificial morphemes or invented grammatical devices (e.g. Novial).
This finally convinced supporters of the systematic languages, and IALA from that point assumed the position that a naturalistic language would be best.
As noted above, Interlingua is the most widely spoken naturalistic auxiliary language.
Thus, a naturalistic fictional language tends to be more difficult and complex.
Where we've tried to theatricalize naturalistic cinematic language, 'La Bohème' will be less theatrical and more cinematic.
Darwin however rejected this view, and used uncompromisingly naturalistic language in place of biblical idiom, starting with The Descent of Man in 1871.
Its main focus lies on instant understandability rather than easy learning, which is a feature typical for naturalistic languages.