Now I have an other problem. I would have to use some extra keys while writing ą,ę,ć,ż,ó,ź and also German umlauts. I found a compiled keyboard for Polish ą,ę etc here http://blog.adl.pl/polski-uklad-klaw...0/416#more-416 but including German umlauts is too much for me
"xvkbd -xsendevent -text '\[dead_diaeresis]'" Control + u