Translation:Please wait here.
Is "please wait in here" an acceptable answer? Does 请在这了等 only apply to waiting inside places, or can it be used to direct someone to stay, for example, at a specific platform?
There is no restriction on the type of places. It can be indoor, outdoor, or even a relative position, e.g. 请在下面等.
“wait in here” could be more precisely translated as “在 这 里面 (inside) 等”.
这里 (here) does not specify the exact position.