Башкирская клавиатура is a free keyboard application for Android devices. It supports three languages: Bashkir, English, and Russian. The app allows the user to switch between different keyboard layouts by long-pressing the "layout selection" key in the bottom row, which opens the system menu to select the available keyboards on the device.

To install the app, go to Menu -> Settings -> Locale & text. In the text settings, select the installed keyboard and set it as the default. Once the keyboard is set up, it can be accessed by long-pressing any text field and selecting the input method.

The developer, Argyn, has released the source code of the project on Yandex Disk, which can be accessed by anyone interested in contributing to the development of the app.

Overall, Башкирская клавиатура is a useful tool for those who need to type in Bashkir on their Android devices. However, it may require some adjustments to work smoothly with different devices and applications.