Overlapping with artlangs is the group of philosophical languages, languages derived from some first principle.

These are also known as philosophical or taxonomic languages.

Fuller's geometric explorations provided an experiential basis for designing and refining a philosophical language.

Dalgarno was also interested in constructing what he called a 'philosophical language', now more usually referred to as universal language.

To put it in more formal philosophical language, we can say that academic freedom is an achievement concept.

Einstein - who often used religious and philosophical language to explain his discoveries - seemed to tell humanity something fundamental about the fabric of existence.

The philosophical language of this century was mostly Greek.

An essay towards a real character, and a philosophical language.

The concept of a universal grammar or language was at the core of the 17th century projects for philosophical languages.

The work is in five parts, of which the fourth contains the discussion of the "real character" and "philosophical language".