Recently there have been reports against an Argentine Treehouse user for their use of the term "travesti"/"trava".

Treehouse will take no action against the use of reclaimed slurs used as in-group language.

Treehouse has a zero-tolerance policy towards transphobia. Please be mindful that other cultures have histories and languages different from your own.

From Julia Serano's book the Whipping Girl:

Further, had I been born in some other country, I might have developed a very different transgender identity. Examples of MTF spectrum transgender people in other cultures include Indian hijras, Brazilian transvestis, Thai katoeys, and Native American “berdaches,” or “two-spirited people.” These transgender identities differ not only in name but in their customs, practices, and social roles. Part of the reason these groups differ relates to the fact that their cultures place more emphasis on certain gender inclinations over others. In some cultures, a person’s gender expression plays a larger role in determining gender than we experience in the United States.

From the Wikipedia page Travesti (gender identity):

The word "travesti", originally pejorative in nature, was reappropriated by Peruvian, Brazilian and Argentine activists, as it has a regional specificity that combines a generalized condition of social vulnerability, an association with sex work, the exclusion of basic rights and its recognition as a non-binary and political identity. Notable travesti rights activists include Argentinians Lohana Berkins, Claudia Pía Baudracco, Diana Sacayán, Marlene Wayar and Susy Shock, and Yren Rotela from Paraguay.

Lohana Berkins, a self-identified travesti, Argentine activist:

founded the Asociación de Lucha por la Identidad Travesti y Transexual [and she] was the driving force behind Law 3062 on respect for identity adopted by travestis and transsexuals and approved by the Buenos Aires Legislature in 2009.