Where can I get an ssl certificate for a rf domain name?

Question

Digital certificates

Preferably free)) Here on lets encrypt writes:

Answer 1

wosign try

Answer 2

Previously, to protect national domains, you had to buy a certificate with the IDN (Internationalized Domain Name) option. Today this is no longer relevant. Now all SSL certificates by default protect domains written in national alphabets using Punycode. Due to technical restrictions, domains cannot contain non-Latin characters. Punycode allows you to encode names in national alphabets with ASCII characters: Latin letters, numbers and hyphens. It is enough to buy the simplest and most inexpensive certificate with domain verification.
ISPsystem - from 743 rubles/year
sslcertificate.ru - from 1,000 rubles/year
RU center - from 3,600 rubles/year

Answer 3

Free, unfortunately I will not prompt.
Of the paid, with support for IDN (Support for national domains):
COMODO. The most popular and most affordable Comodo PositiveSSL
THAWTE
SYMANTEC