QSystemInfo::currentLanguage() returns language based on device country setting not language settings. (Language and region)

Exampes
I set device as
Language Region currentLanguage() returns currentLanguage() returns comment
Suomi Suomi fi FI ok
Svenska Sverige sv SV ok
Svenska Suomi fi FI should be sv FI
Suomi Sverige sv SV should be fi SV

It seems to follow only region setting of device.