yottamozg I am actually using this pump with a basic presta valve adapter (some cheap brass(?) model from Decatlon). It fits well and doesn't cause any noticeable discomfort, if you are using it on a hose (directly screwing it in leaves no flexibility).

yottamozg Notout of the box. You can create your own language file and update the firmware, but this is not a trivial task (I did that for Zürichdeutsch).

yottamozg Noway

yottamozg Yes. The app is just a music player with some extra sleep related functions. It only communicates with mask by playing audio. It detects sleep states from other sensors, not from the mask.

yottamozg It works for me, but you will need either a proper adapter or a simple BT dongle.

yottamozg Yes. It is just normal headphones.

yottamozg No, it can function as normal headphones. Sleepace app is nonessential.

yottamozg There is no BT, because it is designed to be wired. It is more convenient sometimes not to worry about the battery charge and radio connection quality. The cable is long, approximately 1.5m in my case (the current design might have changed, my mask is 2 years old).