diff --git a/se/spelling.py b/se/spelling.py
index 2a4c864e..c68faf20 100644
--- a/se/spelling.py
+++ b/se/spelling.py
@@ -95,31 +95,31 @@ def detect_problem_spellings(xhtml: str) -> list:
 	# language = get_xhtml_language(xhtml)
 	output = []
 
-	if regex.search(r"\bstaid\b", xhtml):
+	if regex.search(r"\bstaid\b", xhtml, flags=regex.I):
 		output.append("“staid” detected. This should be modernized if it is the past tense of “stay,” but not if used as an adjective meaning “sedate or prim.”")
 
-	if regex.search(r"\bcozen\b", xhtml):
+	if regex.search(r"\bcozen\b", xhtml, flags=regex.I):
 		output.append("“cozen” detected. This should be modernized if it means “cousin,” but not if used to mean “to deceive or win over.”")
 
-	if regex.search(r"\bgrown-?up\b", xhtml):
+	if regex.search(r"\bgrown-?up\b", xhtml, flags=regex.I):
 		output.append("“grownup” or “grown-up” detected. Confirm that “grownup” is strictly a noun, and “grown-up” is strictly an adjective.")
 
-	if regex.search(r"\bcommon[\-\s]?sense\b", xhtml):
+	if regex.search(r"\bcommon[\-\s]?sense\b", xhtml, flags=regex.I):
 		output.append("“commonsense” or “common sense” or “common-sense” detected. Confirm that “common sense” and “common-sense” are strictly nouns, and that “commonsense” is strictly an adjective.")
 
-	if regex.search(r"\bmann?ikin\b", xhtml):
+	if regex.search(r"\bmann?ikin\b", xhtml, flags=regex.I):
 		output.append("“mannikin” or “manikin” detected. Confirm that “mannikin” is used in the sense of a small person, and “mannequin” is used in the sense of a dummy or figure.")
 
-	if regex.search(r"\bgripe", xhtml):
+	if regex.search(r"\bgripe", xhtml, flags=regex.I):
 		output.append("“gripe” or “griped” detected. Confirm that “gripe” is used in the sense of illness or complaint, not in the sense of “grip” or “gripped.”")
 
-	if regex.search(r"\bmay[\-\s]?day", xhtml):
+	if regex.search(r"\bmay[\-\s]?day", xhtml, flags=regex.I):
 		output.append("“mayday” or “may day” or “may-day” detected. Confirm that “may day” and “may-day” refer to the day, and that “mayday” is used in the sense of a distress signal.")
 
-	if regex.search(r"\bfree[\-\s]?will", xhtml):
+	if regex.search(r"\bfree[\-\s]?will", xhtml, flags=regex.I):
 		output.append("“freewill” or “free will” or “free-will” detected. Confirm that “free will” and “free-will” are strictly nouns, and that “freewill” is strictly an adjective.")
 
-	if regex.search(r"\bna[iï]f", xhtml):
+	if regex.search(r"\bna[iï]f", xhtml, flags=regex.I):
 		output.append("“naif” or “naïf” detected. Confirm that “naïf” is strictly a noun, and “naive” is strictly an adjective.")
 
 	return output