Fldigi supports the UTF-8 character set in all of it's labels and
widgets (conrols). The Rx and Tx text panels accept both keyboard
and text stream that is in UTF-8 format. Transmission of UTF-8
characters is supported by these modes:
PSK31, PSK63, PSK125, PSK250, PSK500
Olivia - must enable 8 bit extended characters
MT63 - must enable 8 bit extended characters
MFSK - all baudrates supported
For example, the following Russian and annotated texts can be sent and received:
UTF-8 characters are represented by 2 bytes which means that a single
character will take longer to transmit. Transmission speed will
be further reduced on modes like PSK where the character to bit stream
conversion has been optimized for the English language.