Hi Firuz,

Change the command button html like below.

From

<asp:CommandField ButtonType="Link" ShowEditButton="true" ShowDeleteButton="true" ItemStyle-Width="100" />

To

<asp:CommandField ButtonType="Link" ShowEditButton="true" ShowDeleteButton="true"
   ItemStyle-Width="100" CancelText="Отмена" DeleteText="Удалить" EditText="Изменить">
   <ItemStyle Width="100px"></ItemStyle>
</asp:CommandField>