Не отображает русский язык

iPhone 5s и операционная система iOS 9.3.1

Thanks for reporting. Will be fixed in next version.

Dear, BukreevMail

It seems like this is issue with your’s iPhone localization settings.
Please try to go to iOS Settings->Language and Region->REGION FORMATS
and setup Russian formats.
In case if this will not help, let us know - we will investigate more.