In some areas use of the title "Engineer" is regulated. I'm not claiming what's right or wrong on this, just stating how things are.
From Wikipedia [1]:
"The practice of engineering in the UK is not a regulated profession [...] In Continental Europe, Latin America, Turkey and elsewhere the title is limited by law to people with an engineering degree and the use of the title by others is illegal."
[1] https://en.wikipedia.org/wiki/Engineer#Regulation
