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aider quelqu'un
to help someone
soutenir (une cause)
to support (a cause)
s'engager
to get involved
accueillir
to welcome, receive
améliorer
to improve
récolter des fonds
to raise funds
se consacrer à quelque chose
to devote oneself to something
prendre part à, participer à
to take part in
faire des dons
to donate
faire du bénévolat/travail volontaire
do charity/voluntary work
un(e) bénévole
charity worker
Un(e) volontaire
volunteer
les démunies
needy
les défavorisés
underprivileged
les SDF
homeless
les sans-abri (m/f)
homeless people
les exclus (m/f)
outcasts
les seniors (m. pl.)
elderly
une ONG (organisation non gouvernementale)
an NGO (non-governmental organization)
association à but non lucratif (ASBL)
Non-profit organization (BrE) / Not-for-profit organizations (AmE)
association caritative
charity organization
le besoin
need (something necessary)