intl.NumberFormat 显示 es-ES 货币格式的错误结果

Question

I expect that output for es-ES and de-DE locale to be identical. (I asked my Spanish colleague to check his salary slip, and he confirms that there is indeed a decimal after thousand)

var number = 1000;
console.log(new Intl.NumberFormat('de-DE', { style: 'currency', currency: 'EUR' }).format(number));
console.log(new Intl.NumberFormat('es-ES', { style: 'currency', currency: 'EUR' }).format(number));

Results:

> "1.000,00 €"
> "1000,00 €"

Answer 1

According to the Real Academia Española , the standard form in Spanish is to separate numbers in groups of three, separated with whitespace, if the number has more than four digits, ie at least five (Source: https://www.rae.es/dpd/números , section 2.a, in Spanish).

Actually for numbers with five digits, your code gives me the same result for de-DE and es-ES , ie a separation with a dot:

let number2 = 10000
console.log(new Intl.NumberFormat('de-DE', { style: 'currency', currency: 'EUR' }).format(number2));
console.log(new Intl.NumberFormat('es-ES', { style: 'currency', currency: 'EUR' }).format(number2));

gives me

10.000,00 €
10.000,00 €

The separation with dot seems not to be fully correct*, but that the grouping is not done for four-digit numbers seems to be in accord with the language rules of the RAE.

* Actually, also in German, according to the Duden you should use spaces rather than dots, see eg https://www.duden.de/sprachwissen/rechtschreibregeln/zahlen-und-ziffern (in German).