Japanese-German Dictionary

I know only one of the two languages covered by this dictionary, but with that disclaimer I can describe it as a professionally created product that interacts well with the user and other applications. Content from any entry can be copied and pasted into the Notes application. The user can see a magnification of the characters for precise identification. Searching from either language is possible. Search results begin to appear as the user types. The user can specify that the query string is to match the beginning or end of a lemma (middle-of-lemma matching is not available). The matching is per-lemma, not per-word (so "-eifach" won't end-match "dreifach gegabelt"). The only aspect of the UI that I find unintuitive is the buttons that set the input language and the match type. They are labeled with the current state. When you press them, you change the state. But this conflicts with the usual meaning of pressing a labeled button, which is to make the state described by the label active. To make this area of the display intuitive for me, one could display the current state above the button and label the button with the state that one will produce by pressing the button. That would also be more informative.