: To save data or use the app without a connection, you can download Offline Translation Packages in the settings.
: Tap the star icon on any word to save it. You can then use the built-in spaced-repetition system (similar to Anki) to memorize them. Youdao Dictionary Android
: While famous for Chinese-English, it supports over 100 languages including Japanese, Korean, and French. : To save data or use the app