there is no documented evidence or established scientific understanding that suggests people with Dissociative Identity Disorder (DID) speak a totally distinct language. Dissociative Identity Disorder, previously known as Multiple Personality Disorder, is a complex psychiatric condition characterized by the presence of two or more distinct personality states or identities within an individual.
In DID, each personality state, also known as an alter, may have its own unique set of behaviors, memories, emotions, and thoughts. These alters can vary in their manner of speaking, tone, and even language proficiency, but they do not typically develop completely separate languages.
It is important to differentiate between the unique characteristics of alters, such as varying speech patterns or accents, and the development of a distinct language. Any observed differences in speech between alters are more likely a result of differences in their backgrounds, experiences, and the extent of their identity separation.
As scientific understanding of mental health conditions continues to evolve, new research may emerge on the topic. However, as of now, there is no credible information to suggest that people with DID develop entirely separate languages within their alter identities. If there have been any recent developments or research findings after 2023, I would not be aware of them.