A very interesting feature of Windows 7 is the possibility to change the language of the interface. Unfortunately not all versions are compatible, you will need to have an Ultimate or Enterprise version to benefit from it.
First of all, it will be necessary to download the desired language packs. These can be retrieved via Windows Update.
Once downloaded, the language pack is installed.
In the Start menu, enter change language to access the function.
Use the window to select the desired language or to install a downloaded language pack. The languages that appear in the drop-down list are those downloaded from windows update.
Afterwards, a message will warn you that you need to log out.
At the next opening, the language will be changed.