diff --git a/osprey_ui/src/components/entities/RichDescription.tsx b/osprey_ui/src/components/entities/RichDescription.tsx
index 2e4f86f17..36c507c7f 100644
--- a/osprey_ui/src/components/entities/RichDescription.tsx
+++ b/osprey_ui/src/components/entities/RichDescription.tsx
@@ -7,8 +7,8 @@ interface RichDescriptionProps {
   features: { [featureName: string]: string };
 }
 
-const INTERPOLATE_REG_EX = /{([A-z0-9_]+)}/;
-const SPLIT_REG_EX = /(:?{[A-z0-9_]+})/;
+const INTERPOLATE_REG_EX = /{(\w+)}/;
+const SPLIT_REG_EX = /(:?{\w+})/;
 
 const RichDescription = ({ description, features }: RichDescriptionProps) => {
   const interpolatedDescription = description.split(SPLIT_REG_EX).map((part, i) => {
diff --git a/osprey_worker/src/osprey/engine/stdlib/udfs/string.py b/osprey_worker/src/osprey/engine/stdlib/udfs/string.py
index 3844a7a9e..efd03420d 100644
--- a/osprey_worker/src/osprey/engine/stdlib/udfs/string.py
+++ b/osprey_worker/src/osprey/engine/stdlib/udfs/string.py
@@ -235,7 +235,8 @@ class StringCleaningArguments(StringArguments):
 )
 
 # sub for l33t -> leet
-_L33T_THREES_SUB_PATTERN: re.Pattern[str] = re.compile(r'([A-z]?)(3+)([A-z]?)', flags=re.IGNORECASE)
+# with IGNORECASE this matches 3s surrounded by unicode letters like İ, ı, ſ, and K which is expected
+_L33T_THREES_SUB_PATTERN: re.Pattern[str] = re.compile(r'([A-Za-z]?)(3+)([A-Za-z]?)', flags=re.IGNORECASE)
 
 # sub for |7 -> 17
 _L33T_PIPE_NUMBER_SUB_PATTERN: re.Pattern[str] = re.compile(r'\|(\d)')