Seems that Johnny can detect only these hash format:
-descrypt
-bsdcrypt
-md5crypt
-bcrypt
-AFS
-LM
-crypt
-tripcode
-dummy

This is a very small subset of the hash supported by John The Ripper, and looks strange since Johnny actually is a GUI that uses John The Ripper. For example I have tried the attack on some different SHA-256 and SHA-512 hashes and Johnny reports always "gost" as detected hash format.