You Do Need power plug adapter while traveling from Togo 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 Togo is C. This is how they look like.

Togo

In Togo, outlets of type C are in use.

Type C

French Guiana

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

Type C

Type D

Type E