diff --git a/string_utils/string_utils.go b/string_utils/string_utils.go
index ea8d4f4d3b40c229712e32ed4828c1d74e316523..3c60ef531a1872e04be191541750d432a600e023 100644
--- a/string_utils/string_utils.go
+++ b/string_utils/string_utils.go
@@ -62,7 +62,9 @@ var NonOfficialWhitespaceChars = []string{
 	"\u200C", // Zero width non-joiner
 	"\u200D", // Zero width joiner
 	"\u2060", // Word joiner
+	"\u202C", // Pop directional formatting
 	"\uFEFF", // Zero width no-break space
+	"\u00AD", // Soft hyphen
 }
 
 var snakeCaseRegex = regexp.MustCompile("^" + snakeCasePattern + "$")