diff --git a/packaging/tags.py b/packaging/tags.py
index a044aacc..80c63c48 100644
--- a/packaging/tags.py
+++ b/packaging/tags.py
@@ -498,7 +498,10 @@ def platform_tags() -> Iterator[str]:
 
 def interpreter_name() -> str:
     """
-    Returns the name of the running interpreter, usually as two characters.
+    Returns the name of the running interpreter.
+    
+    Some implementations have a reserved, two-letter abbreviation which will
+    be returned when appropriate.
     """
     name = sys.implementation.name
     return INTERPRETER_SHORT_NAMES.get(name) or name