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CopyTranslator vs PLaMo Translate: catalog facts
CopyTranslator	PLaMo Translate
Free Free and open source under GPL v2.	Freemium Free to start; the research does not list paid plan prices.
Windows	macOS, Web, Browser extension
Translates automatically on copy Fixes broken line breaks from PDF text	Translation quality tuned for Japanese output Translates whole Office and PDF files with layout kept
Project website is mainly in Chinese Translation quality depends on the online engines it uses	Interface and documentation are mainly in Japanese Cloud service, so text is sent to the provider
Downloadable app	Downloadable app, Web application, Browser extension
Open source	Closed source
License: GPL-2.0	License not stated
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Needs internet
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 2, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.