Yes, there are several artificial or invented languages that have been created throughout history, with varying degrees of usage and practical purposes. Some of the well-known artificial languages, in addition to the ones you mentioned (Esperanto, Ido, Volapük, and Toki Pona), include:

1. Klingon: This is a constructed language that was developed for the fictional alien species in the Star Trek science fiction franchise. While primarily used in the context of the Star Trek universe, Klingon has a dedicated community of speakers who use it for social interaction, art, and cultural events.
2. Lojban: This is a constructed language that is designed to be logical and unambiguous, with a grammar and vocabulary based on formal logic. It is intended for communication in situations where precision and clarity of expression are important, and it has a small community of speakers who use it for various purposes, including communication, philosophy, and research.
3. Blissymbols: This is a set of symbols that was created to be used as a universal written language for communication with individuals who have limited or no speech abilities. Blissymbols are still used today in some contexts, such as augmentative and alternative communication (AAC) systems for individuals with communication disabilities.
4. Interlingua: This is a constructed language that was designed to be an international auxiliary language, with vocabulary and grammar based on common elements from several European languages. It is intended to be easy to learn for speakers of European languages, and it is used by a small community of speakers for communication, literature, and scientific publications.
5. Láadan: This is a constructed language that was created by feminist linguist Suzette Haden Elgin as an experiment in exploring gender and women's perspectives in language. It has a small community of speakers who use it for communication, literature, and artistic expression.

The practical purposes of these artificial languages vary depending on the language and its community of speakers. Some artificial languages are primarily used for social interaction within specific communities or for artistic expression, while others are designed to be international auxiliary languages for facilitating communication among speakers of different native languages. However, it's important to note that the usage and impact of artificial languages can vary greatly, and their practical purposes may be limited to specific contexts or communities.
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