In Russia, Kazakhstan and Belarus
Russia
The rate can be fixed (it does not change for the whole term) or floating (linked, for example, to the Central Bank's key rate). Interest on a loan is usually charged daily on the outstanding balance, and the real price of the loan is shown by the full cost of credit (ПСК, PSK).
Kazakhstan
In Kazakhstan contracts call it the remuneration rate (ставка вознаграждения), and the real price of the loan is the annual effective rate (ГЭСВ, GESV).
Belarus
In Belarus the rate can also be fixed or variable; a variable rate is often linked to the National Bank's refinancing rate.
Sources: Bank of Russia financial literacy website «Финансовая культура» (Financial Culture)