Imagine checking a map while hearing a foreign-language guide: an illustration, not a hands-on test.
On September 4, 2026, Google announced background translation for Android, including with the screen locked. It also added earpiece listening on iPhone. At that announcement, iOS background support was still forthcoming.
Android help distinguishes two modes. Listening plays translated audio through headphones or the earpiece. Conversation is for taking turns speaking. Korean is among the supported languages. Following an explanation and exchanging remarks call for different modes.
Translation timing is a separate problem. Google’s June 9 announcement says Gemini 3.5 Live Translate generates translated speech continuously before a complete speaking turn ends. It balances waiting for more context against keeping pace with the speaker.
The ending changes the meaning
Consider the Korean phrase “cancel that booking…” followed by “…do not.” The ending changes the instruction. This invented language example explains why context matters; it is not a test of when or how the app translates it.
Session continuity and translation timing are separate. Screen-lock support does not establish speed or accuracy.