[rkomar]

They still offer the dictionary builder on their website, although the latest version seems to be built using cygwin (with the necessary runtime libraries provided). Anyway, if the required dictionary is in some standard format (stardict, xdxf,...), then you can create a PocketBook-specific binary dictionary from it. It looks like you would have to create a morphems.txt file for it, though.

If the dictionary is a standard ebook file, then you can use the built-in search function in the reading applications. You tap in the middle of the screen to bring up the menu, then tap on the search icon, and then type in the search string. You can then navigate through the returned results. It's pretty easy, but building a PocketBook-format dictionary would be better.

P.S. The dictionary converter can be hard to find. There is a version on the Touch Lux support page, as well as an older version in the Archived Pro 902 support page. It looks like some support pages have the link for the software, and some don't.