A clarification. In airspace under responsibility of Spanish State, pilots can use English and Spanish interchangeably. Air traffic control is obliged to assist them in the contact language. Not only in the case of VFR, but also in IFR.
Some years ago there was a timid attempt to force the exclusive use of English in IFR (in Spain), but finally nothing was changed in this subject.
And yes, english with regional accent will be fantastic in FS2020.