Lingwa de planeta (also Lidepla or LdP) is a constructed international auxiliary language^[1] based on widely spoken languages of the world, including Arabic, Mandarin, English, French, German, Hindi, Persian, Portuguese, Russian, and Spanish.^[2]

The main idea of Lidepla is a harmonious whole on the base of the most widespread and influential national languages. The intention is also for it to have something in common with the native languages of most people. With the various source languages from across the globe, it is one of the a posteriori languages.

Development of the language began in 2006 in Saint Petersburg, Russia, by a group of enthusiasts, with Dmitri Ivanov being the project leader. The basic version of the language was published in June 2010.