Translate the following English sentence to French:
"as regards supplementary pensions too, the preservation of acquired rights is essential when a spouse interrupts or abandons his or her work in order to devote himself or herself to his or her family or look after close relatives who are in need of assistance;"
qu'aussi en matière de retraites complémentaires, le maintien des droits acquis est indispensable lorsqu'un conjoint interrompt ou cesse son activité professionnelle pour se consacrer à la famille ou s'occuper de proches ayant besoin d'une aide,