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diff --git a/parser/grammar.ebnf b/parser/grammar.ebnf
index 3be4d16..ccfe6eb 100644
--- a/parser/grammar.ebnf
+++ b/parser/grammar.ebnf
@@ -36,7 +36,7 @@ not_expression: not and_sub_expression
 
 expression_parens : "(" expression ")"
 
-name : /[a-z][a-z0-9_]+/
+name : /[A-Za-zá-ñÁ-Ñ][A-Za-zá-ñÁ-Ñ0-9_]+/
 
 ?and : and_op
      | and_op and_op