APICAD har forbindelser, i forskelligt omfang, med de organisationer der er nævnt nedenfor. Alle organisationerne virker indenfor sprog og specielt indenfor flersprogethed.
L'APIC
CILAROM
Compréhension Intercompréhension des langues romanes
EDILIC
Éducation et Diversité Linguistique et Culturelle
Mondes parallèles
Fondée en 1999 à Marseille, l’association Mondes Parallèles a pour but la reconnaissance des différences comme richesse.
L'OEP
Observatoire européen du plurilinguisme
Plural
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Plurilinguïsmos escolares y aprendizaje de lenguas
L'UPLEGESS
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Association des professeurs de langues étrangères des grandes écoles et de l'enseignement supérieur
IAZ
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I A Z - Initiative Avenir Zukunft e.V.