Design Activism and Subalternes. How can subaltern cultures have voice in design activism fields?

Research Paper (postgraduate) from the year 2016 in the subject Design (Industry, Graphics, Fashion), grade: 10/10, University of Iceland, language: English, abstract: In her essay "Can the Subaltern Speak?", Indian philosopher Gayatri Chakravorty Spivak wonders if subordinates can make their voices heard against Western hegemony, and if so, in which way and using which tools.
According to Spivak, the Western way of thinking, in respect to colonized people, is a particular form of violence, defined by her as "epistemic violence," capable of inducing the colonized to see themselves in a marginal position with respect to colonists.
The West imposes itself as a sovereign ruler of the entire globe, presenting it as the only way and creating the concept of Us vs. Them.

This system is referred to by Spivak as "worlding of a world;" through this process, the West has created its Other, and considers them objects as objects to be analyzed, and thereby takes the power to represent and control them.
Spivak points out that the interest of Western intellectuals against the colonial subject always ends up being a missionary attitude; their mind and their point of view, in the end, coincides with the imperialist narrative because what it promises to the natives is "redemption." These "other" places, "other" ways of thinking, "other" knowledge, are the subject this essay 2.
How subaltern culture can have voice in design activism field and in which way this approach can produce communicable new knowledge in the form of a design method?