I've started Store listing experiment for en-IN English (India) language but I can see this experiment on Google Play although my device uses en-GB English (United Kingdom) locale.
Default Store listing language for my app is en-US English (United States) and en-GB is not listed.
Shouldn't be experiment available only for users with en-IN language and other English languages should fall back to default (en-US)? Can be this Store listing experiments distribution bug?
I've got response from Google Play Developer Support. It is Store listing bug and they are working on fix.