Localisation folder
From EU3 Wiki
The localisation folder contains some .csv files. These files contains the program messages on some languages. The main file is the text.csv, it contains most of the messages. The first row of the text.csv is like this:
CODE;ENGLISH;FRENCH;GERMAN;POLSKI;SPANISH;ITALIAN;SWEDISH;CZECH;HUNGARIAN;DUTCH;PORTUGESE;RUSSIAN;FINNISH;x
It lists all available languages. The first column is the identifier of the message, and the other columns are the translation of the message. If you want to make an translation for your language, you have to write it to the corresponding column. For example you want to write some German message, so you have to write it in the fourth column.

