The Nationalist Left of the Balearic Islands Federation (Catalan: Federació de l'Esquerra Nacionalista de les Illes Balears, Spanish: Federación de la Izquierda Nacionalista de las Islas Baleares, FENIB), also known as Nationalist Left Federation, was formed in 1989 by the Socialist Party of Majorca, Socialist Party of Menorca and Entesa Nacionalista i Ecologista (English: Nationalist and Ecologist Agreement). In 1998 it was transformed into the PSM–Nationalist Agreement party federation.

This article has multiple issues. Please help improve it or discuss these issues on the talk page. (Learn how and when to remove these template messages) You can help expand this article with text translated from the corresponding article in Spanish. (February 2017) Click [show] for important translation instructions. Machine translation, like DeepL or Google Translate, is a useful starting point for translations, but translators must revise errors as necessary and confirm that the translation is accurate, rather than simply copy-pasting machine-translated text into the English Wikipedia. Do not translate text that appears unreliable or low-quality. If possible, verify the text with references provided in the foreign-language article. You must provide copyright attribution in the edit summary accompanying your translation by providing an interlanguage link to the source of your translation. A model attribution edit summary is Content in this edit is translated from the existing Spanish Wikipedia article at [[:es:Federació de l'Esquerra Nacionalista de les Illes Balears]]; see its history for attribution. You may also add the template {{Translated|es|Federació de l'Esquerra Nacionalista de les Illes Balears}} to the talk page. For more guidance, see Wikipedia:Translation. You can help expand this article with text translated from the corresponding article in Catalan. (February 2017) Click [show] for important translation instructions. Machine translation, like DeepL or Google Translate, is a useful starting point for translations, but translators must revise errors as necessary and confirm that the translation is accurate, rather than simply copy-pasting machine-translated text into the English Wikipedia. Do not translate text that appears unreliable or low-quality. If possible, verify the text with references provided in the foreign-language article. You must provide copyright attribution in the edit summary accompanying your translation by providing an interlanguage link to the source of your translation. A model attribution edit summary is Content in this edit is translated from the existing Catalan Wikipedia article at [[:ca:Federació de l'Esquerra Nacionalista de les Illes Balears]]; see its history for attribution. You may also add the template {{Translated|ca|Federació de l'Esquerra Nacionalista de les Illes Balears}} to the talk page. For more guidance, see Wikipedia:Translation.