es, some of these languages are used for more than just recreation or hobby purposes. For example, Esperanto has been used for international communication and diplomacy, and Lojban has been used for research and philosophical discussions.

As for example sentences in these languages, here are a few:
- Esperanto: "Saluton, kiel vi fartas?" (Hello, how are you?)
- Ido: "Kande vu vu jurnala, vu konservar ube trovesa." (When you travel, you keep where you stay.)
- Volapük: "Bal vilomans pük, nulik bal oliks kis buk." (All humans are born free and equal in dignity and rights.)
- Toki Pona: "mi pona tawa sina." (I like you.)
- Klingon: "nuqneH? tlhIngan Hol vIjatlhbe." (What do you want? I speak Klingon.)
- Lojban: "lo nanla cu klama lo zarci" (The boy goes to the store.)
- Blissymbols: The symbols are not used to form sentences in the traditional sense, but rather to represent concepts and ideas in a visual way.
- Interlingua: "Le vocabulario commun de Interlingua facilita le communication inter le populos del mundo." (The common vocabulary of Interlingua facilitates communication between the peoples of the world.)
- Láadan: "Bíi, náa yáa nili. Náa áala uli." (Yes, I see it. I like it.)
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