Can't find European land in Time Capsule setting

Apple sells products that have been "regionalized" for different parts of the world. North America, South America, Europe, Southeast Asia, etc, for example.

It is not possible to change a Time Capsule from one region to another. The reason for this is that different regions have different wireless standards and regulations. See this link for all the details:

List of WLAN channels - Wikipedia, the free encyclopedia

A Time Capsule purchased in the USA will operate from 100-240 Volts and 50/60 Hz automatically, so power wise, it will work just about anywhere in the world if you have the right kind of AC wall socket adapter. (A power transformer or converter is not needed).

But, you will have to be careful about using higher 5 GHz wireless channels on the USA Time Capsule while in Europe, since the use of higher 5 GHz channels is not legal in most European countries at this time. In other words, keep the 5 GHz channel on the USA Time Capsule at Channel 36, 40, 44 or 48.