MouseTooltipTranslator

Mouseover Translate Any Language At Once - Chrome Extension: PDF Translator, EBOOK, EPUB, OCR, TTS, NETFLIX, YOUTUBE DUAL SUBTITLES, GOOGLE DOCS, AI, VIEWER, GMAIL, WRITING, IMAGE, DUAL SUBS, MANGA, HOVER, DICTIONARY, WEBTOON, EDGE, JAPANESE, ENGLISH. Maintained by ttop32 on GitHub, where it has earned 1,308 stars from the community.

It's actively developed around chrome-extension, pdf, translator, and is a solid reference for anyone building with these tools.