You Do Need power plug adapter while traveling from Bolivia to French Guiana.

Here is Why You Need An Adapter

The outlet and plug type used in French Guiana are C, D and E and in Bolivia are A and C. This is how they look like.

Bolivia

In Bolivia, outlets of type A and C are in use.

Type A

Type C

French Guiana

In French Guiana, outlets of type C, D and E are in use.

Type C

Type D

Type E