You Do Need power plug adapter while traveling from Swaziland to Azores.

Here is Why You Need An Adapter

The outlet and plug type used in Azores are B, C and F and in Swaziland is M. This is how they look like.

Swaziland

In Swaziland, outlets of type M are in use.

Type M

Azores

In Azores, outlets of type B, C and F are in use.

Type B

Type C

Type F