Just checked out your website and it is in Vietnamese and had to translate it to understand which is why I don't understand why the primary language is not English making it non-user friendly.
The live chat seems to be broken since nothing loaded when I tried accessing it. Pretty bad first impressions.
You can choose English language! right corner of the screen.
I see the same when I visit your gambling house, though just like what you have said there's options to set it in english language maybe
if you are targeting wide range of gamblers setting it to english as first language will attract more gamblers, as they will understand right
away instead of finding the language settings to set it first.
Regarding to the title post, this welcome bonus always have a catch behind, a wagering requirements, what's the difference from your offer?