Comment by c-smile
<output type="currency">123456.00</output> formats output using user's settings: https://www.elevenforum.com/attachments/currency_format_cont...
If you want specific country format then you may use lang:
<output type="currency" lang="de-DE">123456.00</output>
Currency conversion is not a subject of a browser.
I got totally mad about it and wanted to write a snark comment, but then I checked what it does and it's just number formatting. It doesn't add a euro sign to it. That would have been a bad idea of course.