diff --git a/toonz/sources/include/toonz/childstack.h b/toonz/sources/include/toonz/childstack.h
index 031c4c5..5ab6ca9 100644
--- a/toonz/sources/include/toonz/childstack.h
+++ b/toonz/sources/include/toonz/childstack.h
@@ -110,7 +110,7 @@ Useful by edit in place. Oss.: \b row of current xsheet.
 
   /*!
 Set aff to ancestor affine in \b row. Return true if all ancestors are
-visibile in \b row.
+visible in \b row.
 */
   bool getAncestorAffine(TAffine &aff, int row) const;
 
diff --git a/toonz/sources/toonz/projectpopup.cpp b/toonz/sources/toonz/projectpopup.cpp
index b278148..fd3eecb 100644
--- a/toonz/sources/toonz/projectpopup.cpp
+++ b/toonz/sources/toonz/projectpopup.cpp
@@ -312,7 +312,7 @@ ProjectPopup::ProjectPopup(bool isModal)
   m_rulePreferenceBG->addButton(customRB, Rule_Custom);
   m_rulePreferenceBG->setExclusive(true);
   standardRB->setToolTip(tr(
-      "In the standard mode files with the following file name are handled as sequencial images:\n\
+      "In the standard mode files with the following file name are handled as sequential images:\n\
 [LEVEL_NAME][\".\"or\"_\"][FRAME_NUMBER][SUFFIX].[EXTENSION]\n\
 For [SUFFIX] zero or one occurrences of alphabet (a-z, A-Z) can be used in the standard mode."));
   customRB->setToolTip(