Looks like we never use 'primitive'.

JulienPalard · JulienPalard · commit f6b51e1faa47 · 2017-11-12T20:33:00.000+01:00
diff --git a/README.rst b/README.rst
@@ -113,7 +113,7 @@ argument                   argument (Don't mix with parameter)
 backslash                  antislash, *backslash*
 bound                      lier
 bug                        bogue, *bug*
-built-in                   primitive, native
+built-in                   native
 debugging                  débogage
 double quote               guillemet
 call stack                 pile d'appels
