Fixes 168 - Add "detectedLanguage" data point
As specified in https://gitlab.com/eyeo/adblockplus/abpui/adblockplusui/issues/168
Trac ticket: https://issues.adblockplus.org/ticket/7011
Edited by Andrea Giammarchi
As specified in https://gitlab.com/eyeo/adblockplus/abpui/adblockplusui/issues/168
Trac ticket: https://issues.adblockplus.org/ticket/7011