¿Cómo convertir números a texto en español?

¿Cómo convertir números a texto en español?

Ejemplo: convertir $500.000.- (escribo desde Chile donde utilizamos ese símbolo para el peso, y las cantidadades se separan de a miles por punto y no por coma).

Lo que tengo hasta el momento es lo siguiente, pero me funciona para transformar números del tipo 2345000 pero me falta agregar algo para que pueda utilizar la variable "cientos"... ¿me ayudan?

***tengo lo siguiente:

id = 5614234000022003000; /////este es un ejemplo
rec = zoho.crm.getRecordById("MODULO",id);
monto = rec.get("MONTO");
info monto;
th = {"","mil","millones","billón","trillón"};
// uncomment this line for English Number System
// th = {"","thousand","million", "milliard","billion"};
dg = {"cero","uno","dos","tres","cuatro","cinco","seis","siete","ocho","nueve"};
tn = {"diez","once","doce","trece","catorce","quince","dieciséis","diecisiete","dieciocho","diecinueve"};
tw = {"veinte","treinta","cuarenta","cincuenta","sesenta","setenta","ochenta","noventa"};
tz = {"cien","doscientos","trescientos","cuatrocientos","quinientos","seiscientos","setecientos","ochocientos","novecientos"};
val_s = monto;
x = val_s.length();
info x;
if(x > 15)
{
info "too big";
}
else
{
s = val_s.replaceAll("(?)",",",false).removeFirstOccurence(",").removeLastOccurence(",").toList();
str = "";
sk = 1;
bypass = false;
for each index i in s
{
cur = s.get(i).toLong();
if(!bypass)
{
if((x - i) % 3 == 2)
{
if(cur == 1)
{
next = s.get(i + 1).toLong();
str = str + tn.get(next) + " ";
bypass = true;
sk = 1;
}
else if(cur != 0)
{
str = str + tw.get(cur - 2) + " ";
sk = 1;
}
}
else if(cur != 0)
{
str = str + dg.get(cur) + " ";
if((x - i) % 3 == 0)
{
str = str + "cientos ";
sk = 1;
}
}
}
else
{
bypass = false;
}
if((x - i) % 3 == 1)
{
if(sk != 0)
{
str = str + th.get(floor((x - i - 1) / 3)) + " ";
sk = 0;
}
}
}
info str;
}





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