Comment by theodric
2 years ago
I have a pair of Bluetooth headphones that indexes through 3 languages (Mandarin, Korean, English) on startup when you also hold down some other button besides power (play/pause IIRC). I don't think it's documented. Maybe your speaker is similar.
I found a solution today in an Amazon review. I had to press 3 buttons at once, and the language switched back to English.