This assumes you are using npm as your package manager. If you don’t, you can access these files on unpkg, download them, or point your package manager to them. lang? - Determines the language for the data to be displayed on. For example country and city names. If you use a non-cyrillic language, cyrillic symbols will be transtiterated automatically en – English, ru – Russian, ua – Ukrainian, be – Belorussian, es – Spanish, fi – finnish, de – German, it – Italian. Numeric format from account.getInfo is supported as well.