No single form is always correct. Use an endonym when the aim is to present the name in the place’s official or well-established language; use an exonym when it is being used outside the place’s local language area. A familiar English name can be a practical choice for an English-speaking audience, but familiarity does not make it a separate technical category: it may still be an exonym.
Which form fits the situation?
| Situation | Form to consider | Key point |
|---|---|---|
| Presenting the name through its official or well-established language | Endonym | The UN Group of Experts on Geographical Names uses this term for a geographical feature’s name in such a language. |
| Writing for readers outside the place’s local language area | Exonym | The name is being used beyond its local linguistic context. |
| Using an English label that the intended audience is likely to understand | Familiar English name | This describes familiarity, not a third category. Classify the name according to its actual use. |
| Comparing a place name with a passport or visa | Exact document wording | The endonym–exonym distinction alone does not determine what appears on a travel document. |
For general English-language writing, the endonym is the logical starting point when local usage matters. A familiar English name may be clearer for the audience, particularly when the two forms are both given and the relationship between them is explained rather than implied.
How to check which one you have
-
Identify the place precisely.
Establish which country, region, city or geographical feature the name refers to. Similar names used in different language contexts should not be treated as interchangeable without checking their origins and usage. -
Identify the language context.
Ask whether the form belongs to an official or well-established language associated with the place. This is the relevant test when considering whether a name is an endonym. -
Consider where the name is being used.
If it is being used outside the place’s local language area, it fits the exonym description. An English name can be familiar without being local, so recognition alone does not settle the classification. -
Check romanisation when the original uses a non-Roman script.
UNGEGN promotes consistent romanisation for such place names, including a single scientifically based romanisation system for each script or language. Apply the relevant system consistently and verify the resulting spelling rather than converting the name informally. -
Separate linguistic preference from document matching.
A linguistically appropriate name may not reproduce the exact form used by a document issuer. When a name is being checked against a passport, visa or other official record, use the document’s current wording for that comparison. General romanisation guidance does not establish an individual document requirement.
What the reader must still confirm
Before choosing a final form, verify:
- whether the language is official or well-established in the relevant context;
- whether the English name is being used outside the local language area;
- which romanisation system and exact spelling apply;
- whether a publication has its own style convention; and
- what wording the relevant authority requires when a name must match a travel document.
The practical rule is therefore conditional: use the endonym when local linguistic usage is the priority, a familiar English exonym when it serves clarity for the intended audience, and the exact official wording whenever the name is being matched to a document or record.