Verdict: While the specific "NumLetras" add-in was historically a staple for Spanish-speaking Excel users, in 2021 and newer versions, it has largely been rendered obsolete by native Microsoft functions. However, for older file compatibility or specific regional formatting needs, it remains a functional, albeit "legacy," tool. What is "NumLetras"? NumLetras is a custom function (UDF – User Defined Function) created in VBA (Visual Basic for Applications) that converts a numeric value into its written text equivalent in Spanish. For example, it converts 1250.50 into "Mil doscientos cincuenta pesos con 50/100." Hdmovie2 In English | Hot Better