Qt Creator not fully translated

Operation system is Windows 10 Pro x64.

The translation to Russian language is not loaded full. The setting "Language" in enviroment is "System" or "Russian", but the page "Welcome tab"->"Projects tab" not contains translation for russian language, i.e. threre is still buttons with text "New Project", "Open Project", labels "Sessions" and "Recent projects". The same is in the "Editor tab" - project tree nodes are not translated to Russian, i.e. "Headers", "Sources", "Forms" and "Resources" nodes.