Number and thousand separator in an animation

https://www.motionscript.com/design-guide/counter.html

No need to reinvent the wheel. Just substitute the comma with whatever spaces you want.

Mylenium

If you have iExpressions, you could use the Counter Number iExpression.

In the user interface of the iExpression you can enter any symbol as thousands separator symbol (also something like multiple spaces for bigger gaps).

In your expression, you could add some code which replaces each space by multiple spaces to make the space wider:
NUM = Math.round(effect("Paramètre glissière")("Curseur"))
NUM = NUM.toLocaleString("fr-FR");
NUM.replace(/ /g, '  ') // note that there are two spaces in the string '  '

Uptade : i tried this 
NUM = Math.round(effect("Paramètre glissière")("Curseur"))
NUM.toLocaleString("fr-FR")

Now there's a space...but very tiny 😞