You Do Need power plug adapter while traveling from Bosnia & Herzegovina 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 Bosnia & Herzegovina are C and F. This is how they look like.

Bosnia & Herzegovina

In Bosnia & Herzegovina, outlets of type C and F are in use.

Type C

Type F

French Guiana

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

Type C

Type D

Type E