Why can one Tibeto-Burman language have several different names?

In the study of Tibeto-Burman languages, it is common for a single language to be known by several different names. This profusion of designations often makes it difficult to determine the exact number of languages within the family.1

Several factors contribute to this naming complexity:

• Naming Types: A language may be referred to by its autonym (the name used by its speakers), one or more exonyms (names given by other groups), paleonyms (older names, some of which may now be considered pejorative), and neonyms (newer names that have replaced older ones).1
• Ethnic and Linguistic Confusion: There is frequent confusion between names that denote specific languages and those that denote ethnic groups. Many of the more than 1,400 recorded names for Tibeto-Burman languages are simply multiple designations for the same language or dialect.1
• Political and Social Factors: Political changes can influence nomenclature, such as when a country adopts a new official ethnonym. Additionally, small or vulnerable groups may adopt the name of a larger, more prestigious neighboring group.1
• Scope Ambiguity: Many names are used in both narrow and broad senses, sometimes referring to a single specific language and at other times to an entire group of related languages.1