Input Date to Written form - google-sheets

Question

I'm trying to write an inputted date from the adjacent cell.
i.e. date entered in A1, B1 = A1 but in word form (in Spanish).
I'm close to a solution but I'm sure making things more complicated than they need to be.
The date column(A) is currently being separated into 3;
day(B), month(D), year(F), using; =LEFT($A1;2), =MID($A1;4;2), =RIGHT($A1;4) accordingly.
In Columns C,E,G I'm using
=INDEX(IMPORTXML("https://www.buscapalabra.com/numeros-a-letras.html?cifra="&B1;"//li[1]//strong");1)
where B1 changes to E1, F1 depending on the column
finally in column H where the date will be written I use:
=trim(LOwer($C2&"de "&TEXT($D2;"mmmm")&" de "&$F2))&If(Value(Right($E2;1))=1;If(Value(MID($E2;4;1))<>1;"o";"");"")
For some reason the text value returned from the site has a space on the end and also does not properly word numbers ending in 1. Hence the use of TRIM() & the nested IF()
It works for now, I haven't tested it exhaustedly but I'd love to hear what people think, I'm new to Sheets but there has to be a cleaner way to do this.

Answer 1

Use custom functions:
You could do this with an Apps Script Custom Function.
First, open a bound script by selecting Tools > Script editor, and copy the following functions to the script (check inline comments for more information):
function DATE_IN_WORDS(date) {
const day = date.getDate(); // Day of the month in numbers
const year = date.getFullYear(); // Year in numbers
const options = { month: 'long'};
const month = new Intl.DateTimeFormat('es-ES', options).format(date); // Month in words
const dayAndYear = [day, year].map(number => { // Retrieve word for day and year
const url = "https://www.buscapalabra.com/numeros-a-letras.html?cifra=" + number
const resp = UrlFetchApp.fetch(url).getContentText();
const first = "<em>Como sustantivo:</em> El <strong>";
const cut = resp.substring(resp.indexOf(first), resp.length);
let word = cut.substring(first.length, cut.indexOf("</strong>")); // Get desired section of HTML
if (number.toString().slice(-1) == "1" && number.toString().slice(-2) != "11") {
word = word.trim() + "o"; // Replace "un" with "uno"
let arrayWord = word.split(" ");
let lastWord = arrayWord.pop();
if (lastWord === "veintiúno") { // If 21, replace "ú" with "u"
lastWord = lastWord.replace("ú", "u");
arrayWord.push(lastWord);
word = arrayWord.join(" ");
}
return word;
} else return word;
});
return dayAndYear.join("de " + month + " de "); // Join day, month and year
}
This function uses:
Intl.DateTimeFormat to retrieve the month in Spanish.
UrlFetchApp to fetch information from https://www.buscapalabra.com/numeros-a-letras.html.
Once it is defined, you can use the function DATE_IN_WORDS the same you would any sheets built-in function. This function would accept the cell with the Date as a parameter.
Example:
Reference:
Custom Functions in Google Sheets