Lands you control are every basic land type in addition to their other types.
Each land you control will have the land types Plains, Island, Swamp, Mountain, and Forest. They’ll also have the mana ability of each basic land type (for example, Forests can tap to produce {G}). They’ll still have their other subtypes and abilities.
Giving a land extra basic land types doesn’t change its name or whether it’s legendary or basic.