EinkBro

Better External Search Feature In Settings -> Search, you can configure "custom search url when it comes from external" and also Split Search Setting to add multiple search actions.

For each action, you can setup some dicionary websites like: Japanese: https://dictionary.goo.ne.jp/srch/all/%s Korean: https://dict.naver.com/dict.search?dicQuery=%s French: https://www.frdic.com/dicts/fr/%s

And then, if you read books, you can enable multi-window from Android platform, show EinkBro on the other side, and lookup words in the book.

**ps. remember to turn on "Search in the same tab" option as well, so that it's possible to use other search action on the same tab.