When refreshing the Product Detail page, the Japanese translation for "There is no order selected" appears briefly. If there is an order created I did not observe the Japanese text.
The text appears in the language matching the user's locale immediately.
The text appears in a different language which doesn't match the user's locale before switching to the correct language.
This was observed using 2.1.0 RC6 on 7.2 with a FP5 candidate downloaded on March 31st