I want to know the answer to the following question:
Why are Dzongkha, Sikkimese, Sherpa, and Ladakhi considered to be separate languages?
All the background I'm provided with is that "Other forms, particularly Dzongkha, Sikkimese, Sherpa, and Ladakhi, are considered by their speakers, largely for political reasons, to be separate languages.". Is that enough to answer the question?