A pine tree is 'un pin' in French.
Brunch(Breakfast/lunch) = Almutang(Almusal/tanghalian)
a tree surgon is called 'un élagueur' in French, from the verb: 'élaguer'.
cocottier
cet arbre-là
un mûrier
Sucre i think
erable arbre
un châtaignier
Quel Bel Arbre
Did you mean HOW do you say people in French? les gens
You can say "inutile" to mean useless in French.