This simple script can rename files in specific folder from latin translited names to cyrillic
Put files you want to rename in separate directory, enter it and run the script. If there will be original english names script will skip it
$ mkdir ~/tempdir
$ mv ~/Downloads/Teoria_avtomaticheskogo_upravlenia_E_I_Yurevich.pdf ~/tempdir
$ cd ~/tempdir
$ python3 ~/path/to/script/rename-translit.py -e pdf
otput will be
>>> Teoriya_avtomaticheskogo_upravleniya_E_I_Yurevich.pdf renamed to Теория_автоматического_управления_Е_И_Юревич.pdf
>>> 1 files succesfully renamed