Index: tests/interp.test
===================================================================
diff -u -rd4706d18f1881fd9d7c0ba017b56002dd227912e -r357028ca6e4ffd7ec4ed240e75c9c001f9c4a8cc
--- tests/interp.test	(.../interp.test)	(revision d4706d18f1881fd9d7c0ba017b56002dd227912e)
+++ tests/interp.test	(.../interp.test)	(revision 357028ca6e4ffd7ec4ed240e75c9c001f9c4a8cc)
@@ -563,12 +563,12 @@
   # maintained during [interp hide|expose] operations. Using a
   # pointer-based (reverse) lookup based on tcd->aliasedCmd would be
   # possible (I did it testwise), but then we would have to revise the
-  # current behaviour of NsfProcAliasMethod() for target proc
+  # current behavior of NsfProcAliasMethod() for target proc
   # renamings also. A non-deleting [rename] currently also interrupts
   # an alias binding.  See the relevant tests on [rename ::foo ::foo2]
   # in tests/alias.test. To be consistent, and because [interp
   # hide|expose] is a two-step [rename], technically, we keep the
-  # current behaviour.
+  # current behavior.
   #
   $i expose FOO OOF
 
@@ -611,7 +611,7 @@
   #
   # Objects as intermediary aliases are transparent when being
   # hidden|exposed; hiding and exposing them (under differing command
-  # names) do not affect the dispatch behaviour; this is due to the
+  # names) do not affect the dispatch behavior; this is due to the
   # ensemble dispatch strategy ...
   #