Nymeria seized the power over Dorne by murdering its native kings and sending them to the Wall and replaced Dornish customs with Rhoynar as well as put Rhoynar settlers there while Targaryens kept everything untouched, except maybe for stopping the wars and improving the general state of the land, and there’s no Valyrian settlers in Westeros.
Anon maybe talking about this post.
She didn't "replace" any Andal customs. Her people and their people intermarried and influenced the already there culture. Her people were also not "settlers", or that sort; she teamed up with Mors Martell in conquest of other Dornish people. And there is no Ny Sar/motherland that directs the supposed colonization of Andal-FM Dornishmen for her people to really go back to if they so choose or were ordered to and for them to send the resources they supposedly seized for the economic benefit of said motherland...which you kinda need to call something a settler sort of colonialism:
people from one country settle in another country for the purpose of exploiting its people and natural resources
the act of taking control of an area or a country that is not your own, especially using force, and sending people from your own country to live there
the exploitation of the valuable assets and supplies of the nation that was conquered and the conquering nation then gaining the benefits from the spoils of the war.”
Stanford - “The term colony comes from the Latin word colonus, meaning farmer. This root reminds us that the practice of colonialism usually involved the transfer of population to a new territory, where the arrivals lived as permanent settlers while maintaining political allegiance to their country of origin.”
https://www.theindigenousfoundation.org/
In settler colonialism the most important thing is land (water, earth, and air), because it is the source of capital and the new home of the settlers. It is also key to settler colonialism because “the disruption of Indigenous relationships to land represents a profound epistemic, ontological, cosmological violence.” This violence continues with every day of occupation as settler colonialism is a structure and not an event.
Beyond this the colonizers, in the process of settler colonialism, redefine the relationships between people and land as only being those of an owner to his property. All other relationships and connections to land are made to be pre-modern and backward as land is recast as property, a resource, and nothing more. This is done by the settlers through the destruction of Indigenous peoples, Indigenous communities and Indigenous peoples’ claims to land under settler regimes. In order for settler colonialism to occur, land is seen as a ‘resource’ and Indigenous peoples are erased so that the settlers can “truly claim ownership” of the land.
We really don't need to confuse the words in order to defend the Targs from Targ antis.