Bug in recognizing Italian names of countries

It looks like there is a bug in Data Types, Geography, in Excel. If I write in a sheet

that is, the Italian names of Italy, France, England, Germany, Nederland, Spain, Portugal, and Greece, I select all of them and then I mark them as Geographic data, Excel recognize all of them but England and Spain.

However, if I use UK instead of Inghilterra and Spain (in English!) instead of Spagna, that is

Excel recognizes those two too, and change them to Regno Unito and Spagna. The strange behavior is that it uses Spagna as I did before, but only if I write Spain.

Any idea why?