Can't get a result out of the while loop

[סער וינברג‎]

Hey guyz!

I have a problem to get an updated result out of a while loop.

Already spent a few days reading articles and trying to figure it out...

Hopefully you can help :)

I want to take a title (string) and if its length is less than 78, I want to add words to it randomlly,

Using a list of words in a sheet.

This is working prefectly, the problem is that its adding same words over and over again.

I searched for a way to remove duplicates and found the [...new Set(arr)], and It works perfectly.

Yet when I try to use it in a while loop (every loop check remove duplicates) , the end result still has duplicates.

I am adding the sheet which will help you understand it better,
Sheet

And here's the code.

/**

* Adds Brand, adds words to 80 letters.

* 

* @Param Title the base title used

* @Param Brand the store brand (Ess,Eag..)

* @customfunction

*/

function AddKeyWords(title, brand) {

  

  title = ChangeTitleWords(title, brand); //previous function.

  //title = "Just a few words";

  if(title == "Missing Brand" || title == "") {

   return "Missing Brand or Title"; 

  } else {

    let wordsArr = title.split(" "); //split title to array

    let len = title.length; 

    

    //If title is more than 80 notes, remove words of it.

    while (wordsArr.join(" ").length > 80) {

      wordsArr.pop();

    }

    

    let Title2 = wordsArr.join(" ");

    let Title2Len = Title2.length;

    let len2 = 80 - Title2Len;

    

    //if title had less than 78 notes, add a random word

    while (len2 > 3) {

      let wordsArr1 = title.split(" ");

      

      if (len2 == 3) {

        wordsArr.push(random3());

      } else if (len2 == 4) {

        wordsArr.push(random4());

      } else if (len2 >= 5 && len2 < 18) {

        wordsArr.push(random5());

      } else if (len2 >= 18) {

        wordsArr.push(random10());

      }

      

      wordsArr = [...new Set(wordsArr)]; // create a new arr without duplicates

      len2 = 80 - wordsArr.join(" ").length;

      //return title3;

      

      title3 = wordsArr;

    }

    

    return title3.join(" ");

  }

}

   

////Random Functions.

function getRandomInt(min, max) {

    return Math.floor(Math.random() * (max - min + 1)) + min;      

}     

function random3() {

  var t = SpreadsheetApp.getActive().getSheetByName('Settings').getRange('L5:L').getValues().filter(String)

  return(t[getRandomInt(0, t.length-1)]);

} 

function random4() {

  var t = SpreadsheetApp.getActive().getSheetByName('Settings').getRange('M5:M').getValues().filter(String)

  return(t[getRandomInt(0, t.length-1)]);

} 

function random5() {

  var t = SpreadsheetApp.getActive().getSheetByName('Settings').getRange('N5:N').getValues().filter(String)

  return(t[getRandomInt(0, t.length-1)]);

} 

function random10() {

  var t = SpreadsheetApp.getActive().getSheetByName('Settings').getRange('O5:O').getValues().filter(String)

  return(t[getRandomInt(0, t.length-1)]);

}