fictitious
BrE /ˈfɪktɪʃəs/ AmE /ˈfɪkˌtɪʃəs/
adjective en → es
not real or true; invented for a story, play, etc.
falso, imaginario, inventado
Collocations a fictitious character · a fictitious company
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The story is about a fictitious island.
La historia trata sobre una isla ficticia.