diff --git a/spyder/plugins/editor/widgets/codeeditor.py b/spyder/plugins/editor/widgets/codeeditor.py
index dd86abb5375..6c86b3dcabe 100644
--- a/spyder/plugins/editor/widgets/codeeditor.py
+++ b/spyder/plugins/editor/widgets/codeeditor.py
@@ -3982,7 +3982,9 @@ def insert_text(event):
                 ind = lambda txt: len(txt)-len(txt.lstrip())
                 prevtxt = to_text_string(self.textCursor(
                                                 ).block().previous().text())
-                if ind(leading_text) == ind(prevtxt.rstrip()):
+                if self.language == 'Python':
+                    prevtxt = prevtxt.rstrip()
+                if ind(leading_text) == ind(prevtxt):
                     self.unindent(force=True)
             insert_text(event)
         elif key == Qt.Key_Space and not shift and not ctrl \
@@ -3993,7 +3995,9 @@ def insert_text(event):
                 ind = lambda txt: len(txt)-len(txt.lstrip())
                 prevtxt = to_text_string(self.textCursor(
                                                 ).block().previous().text())
-                if ind(leading_text) == ind(prevtxt.rstrip()):
+                if self.language == 'Python':
+                    prevtxt = prevtxt.rstrip()
+                if ind(leading_text) == ind(prevtxt):
                     self.unindent(force=True)
             insert_text(event)
         elif key == Qt.Key_Tab and not ctrl: