Un popolo, un fine, una fede

15:31 Dec 1, 2017 

your Translation is also confirmed in JimDavis`link. So why not post it as an answer ?

12:35 Dec 1, 2017 

The official language of Senegal is French so it seems you are translating a translation of the original French into Italian now going into English. The original French is " Un Peuple – Un But – Une Foi " the motto of Senegal https://www.sec.gouv.sn/Symbolique-nationale.html I would go for something like "One people, one purpose, one faith", but you would do best to post the French as French to English, but getting the place and date of birth and the names 100% accurate would be more important.