diff --git a/frontend/src/type-input-listener.ts b/frontend/src/type-input-listener.ts
index 13001ec..b83b083 100644
--- a/frontend/src/type-input-listener.ts
+++ b/frontend/src/type-input-listener.ts
@@ -19,8 +19,8 @@ function modifyValue(area: HTMLInputElement) {
 	const value = parseBack(area.value);
 	const start = area.selectionStart;
 	const end = area.selectionEnd;
-	// ignore brackets, allow '>', spaces, ':', '.' or '∀' in front and '-', spaces, '.', ':' or ';' at the end of string
-	area.value = value.replace(/(^|\s+|\(|\)|>|∀|:|\.)t[0-9]+(?=\s+|\)|\(|-|:|\.|;|$)/ig, replacer);
+	// ignore brackets, allow '>', spaces, ':', '.', ',' or '∀' in front and '-', spaces, '.', ':', ',' or ';' at the end of string
+	area.value = value.replace(/(^|\s+|\(|\)|>|∀|:|,|\.)t[0-9]+(?=\s+|\)|\(|-|:|\.|;|,|$)/ig, replacer);
 	area.selectionStart = start;
 	area.selectionEnd = end;
 }
diff --git a/src/main/resources/language/general.properties b/src/main/resources/language/general.properties
index 35cfc6b..c829e3c 100644
--- a/src/main/resources/language/general.properties
+++ b/src/main/resources/language/general.properties
@@ -23,10 +23,11 @@ root.termGrammar=\u2329Term\u232A ::= (\u2329Term\u232A) | \u2329App\u232A | \u2
 \u2329Const\u232A ::= [0-9]+ | true | false
 
 root.typeGrammar=\u2329Type\u232A ::= \u2329QuantifiedType\u232A | \u2329NormalType\u232A <br> \
-\u2329QuantifiedType\u232A ::= <b>∀</b>\u2329VarType\u232A<b>.</b>\u2329NormalType\u232A <br> \
+\u2329QuantifiedType\u232A ::= <b>∀</b>\u2329EnumVarType\u232A<b>.</b>\u2329NormalType\u232A <br> \
 \u2329NormalType\u232A ::= (\u2329NormalType\u232A) | \u2329NamedType\u232A | \u2329VarType\u232A | \
 \u2329FunctionType\u232A <br> \
 \u2329NamedType\u232A ::= [a-zA-Z][a-zA-Z0-9]*&nbsp;&nbsp\\t[0-9]+ <br> \
+\u2329EnumVarType\u232A ::= \u2329VarType\u232A <b>,</b> \u2329EnumVarType\u232A | \u2329VarType\u232A <br>\
 \u2329VarType\u232A ::= t[0-9]+ <br> \
 \u2329FunctionType\u232A ::= \u2329NormalType\u232A -> \u2329NormalType\u232A