Example of xrdp_keyboard.ini for russian keyboard

xrdp_keyboard.ini

[default_rdp_layouts]
rdp_layout_us=0x00000409
rdp_layout_de=0x00000407
rdp_layout_fr=0x0000040C
rdp_layout_it=0x00000410
rdp_layout_jp=0x00000411
rdp_layout_jp2=0xe0010411
rdp_layout_jp3=0xe0200411
rdp_layout_jp4=0xe0210411
rdp_layout_ru=0x00000419
rdp_layout_se=0x0000041D
rdp_layout_pt=0x00000816
rdp_layout_br=0x00000416
rdp_layout_pl=0x00000415

[rdp_keyboard_ru]
keyboard_type=4
keyboard_subtype=1
model=pc105
options=grp:alt_shift_toggle
rdp_layouts=default_rdp_layouts
layouts_map=layouts_map_ru

[layouts_map_ru]
rdp_layout_us=us,ru
rdp_layout_ru=us,ru

or you can execute this command, but after re-login you should repeat the command.

setxkbmap -layout us,ru -variant ',winkeys' -option 'grp:alt_shift_toggle,grp_led:scroll'