Hello! 
I have been using LanguageCrush for a few months, and really like the reading tool. I do have some feedback on minor annoyances which I'm listing below.
Hotkeys
- When using the arrow keys to move between words, I want to skip over words marked as ignored (thus only moving between unknown or learning words).
- A hotkey to open up your default dictionary when a word is selected.
Dictionaries
- Ability to add Wiktionary lookup alongside other dictionaries
- Fix strange default translations. See image below for an example where the default translation is incorrect, clearly not matching other dictionaries.
UI
- Ability to filter passages by whether I have marked them as read or not.