@grega_g
using a dictionary is a two step procedure: first you need to activate the dictionary from the bottom menu (after that the menu can be closed while dictionary will still be active) then you have to select a word to activate translation... I'd personally prefer double tapping on the word, but selecting works pretty good too to me
the dictionary stays active until deactivated from the bottom menu or by turning off the device - as far as I noticed it is active after waking up from a sleep mode
