Yes, out store Gooplayer support English and German and multiple languages.
#4 Can I listen to music using wifi? Leaving my cell far away.
Well it doesn't play on the watch but it has a remote controller option.
#5 Will it record steps if I am away from my phone? Like if I go for a few miles run without my phone?
Yes, but without maps records
#6 Is the run distance in km along with route recorded withou phone?
It does not have internal GPS. You will get the aproximate distance of your activity, time, pace but do not expect acuracy without linking it to your pnone. It does not record routes without a phone.
#7 Run distance calculated in km or miles?? Or just the step count?
You can choose in your mi fit app which unit system you prefer(metric or imperial).