Found a russian version as it seems
wouldn't know of course if it was translated before sending it to bristish ambassador, or if Sergyk Czernonoho wrote two versions in two languages
https://pikabu.ru/story/posmotrel_pervyie_100_stranits_vsego_zayavleno_80000_iz_opublikovannyikh_dokumentov_ob_ubiystve_kennedi_12508116