The latter included translations into Ket of famous Russian songs such as popular hits of Alla Pugacheva, Natali, Valery Leontiev, Tatiana Bulanova and Sofia Rotaru, among others.
The lyrics of his songs were mainly inspired by his native land, the village of Kellog where he had lived all his life, nearby flowing river Yeloguy, as well as Lake Dynda.
Kotusov also helped with the translation of texts written by Olga Latikova (1917–2007), an authority on Ket folklore from Sulomai village, Evenky District.
A few months later Kotusov ended up in a Krasnoyarsk hospital under cancer treatment, but doctors discharged him without providing adequate medical care.
When political activist Yulia Galyamina and anthropologist Nikita Petrov learned about the situation they helped to raise 45,000 rubles among Moscow linguists.