Dabbling around the Holy Roman Empire again because I have a few minutes and no access to my own source material.
Otto (Ottonian) Holy Roman Empire is the name on the profile, Otto (Otto I) "the Great, Kaiser des Heiligen Römischen Reiches (Liudolfinger), Liudolfinger, of Sachsen Italy and Germany" Holy Roman Empire formerly Ottonian is what the WikiTree way of naming makes of it.
Now, judging from these entries and keeping in mind general WikiTree style guides (Use their conventions instead of ours) one should conclude that they all spoke English, those Holy Roman Emperors and German and Italian Kings. According to the biography this is the top level profile. Couldn't we do a little better with respect to the name?
Next, he was supposedly born in Wallhausen, Landkreis Mansfeld-Südharz, Thüringische Mark, Sachsen-Anhalt, Ostenfrankenreich, Germany. Wikipedia, FMG, the Henry Project, all list his birth place as unknown. Shouldn't we expect from a top level profile to have sources for such locations? (Apart from the fact that the Landkreis Mansfeld-Südharz came into being only on July 1, 2007, and Sachsen-Anhalt on July 21, 1947. The same applies to his death, the Burgenlandkreis did not exist before 1994.)