Reading articles in foreign languages is a good and fast way to perfect language skills and I am sure the same thing must have occurred to others before me as well.
I am searching for iOS app for iPad built for reading texts, where, apart from the "define" option for certain words that are available systemwide, one also has the option to translate the word to a given language - in case I am reading foreign text and do not know any particular word.
Ideally the app should support this for PDF's with selectable text, for most of my texts are in those, but if there is no such, I could also convert my PDF's to desirable format.
I checked a number of such apps but so far, but the only one I found with a "translate" option is PerfectReader, which uses Wiktionary as a dictionary; the problem is its vocabulary is practically unusable.