Example screenshot shows the result of invoking Ctrl-Alt-F7 on a resource bundle key reference. (In this case from a <spring:message> JSP tag)
The resource bundle contains values for this key in three locales. IDEA seems to ask me for which specific definition I want to find usages.
The question does not make sense, since all references refer to the same key. It's impossible/meaningless to distinguish usages by locale.