Regular expression to check number system

I am working on an application that takes numbers and converts them to the locale format. In order to do so I must first identify which locale the entered number belongs to format it accordingly.

Therefore, can anybody please provide Regex to match which number system the given number belongs too?

Example:

Regex for number system 1:

• 1 // should match
• 10 // should match
• 1000 //should match
• 1000.00 //should match
• 1,000.00 //should match

And so on..

Regex for number system 2:

• 1 // should match
• 10 // should match
• 1000 // should match
• 1.000 // should match
• 1.000,00 // should match

And so on..

Regex for number system 3:

• 1 // should match
• 10 // should match
• 1000 // should match
• 1 000 // should match
• 1 000.00 // should match.

And so on..

So far I have written this: /^\d*[,]?\d*\.?\d+$/ But this doesn't work if there are more than one thousand separators. Example: 10,00,000.00

I basically need three regex to check which of the 3 widely used number system the entered number belongs to.

<!-- begin snippet: js hide: false console: true babel: false -->

<!-- language: lang-js -->

const commaDot = /^(?:\d{0,3}(?:,\d{3})|\d+)(?:\.\d+)?$/
const dotComma = /^(?:\d{0,3}(?:\.\d{3})|\d+)(?:,\d+)?$/
const spaceDot = /^(?:\d{0,3}(?: \d{3})|\d+)(?:\.\d+)?$/

const cases = [
  '1',
  '10',
  '1000',
  '1000.00',
  '1,000.00',

  '1',
  '10',
  '1000',
  '1000,00',
  '1.000,00',

  '1',
  '10',
  '1000',
  '1000.00',
  '1 000.00',
]

for (const cas of cases) {
  console.log(
    cas,
    'matches:',
    cas.match(commaDot) ? '1' : '',
    cas.match(dotComma) ? '2' : '',
    cas.match(spaceDot) ? '3' : ''
  )
}

<!-- end snippet -->