Europanto is a macaronic language concept with a fluid vocabulary from European languages of the user's choice or need. Wikipedia

Compromised planned language Wikidata

An artificial language which as a joke was invented by the journalist and interpreter at the European Union headquarter, Diego Marani in Brussels, Belgium, in the year 1996. It biolds a ot on English, but also to a large extent incorporates worda and other elements from each of the official languages of the EU. Specific choices are basically left pretty freely to the user under the premise that the goal is understandability for the actual audience. OmegaWiki

An artificial language originally created by Diego Marani in 1996, combining vocabulary from a number of European languages. Wiktionary

Artificial language. Wiktionary (translation)