I admire anyone who sets out to invent a language... but of course, there are two categories: the "true" invented languages, which are intended to sound as "for

I admire anyone who sets out to invent a language... but of course, there are two categories: the "true" invented languages, which are intended to sound as "foreign" as possible to human ears (Klingon, Tolkien's languages, ...) and languages like Volapük and Esperanto, that were based on common roots of various languages in order to sound more familiar (at least to people who already speak a European language).