Windows:
- Find the file "converted_countries_l_english.yml" in C:\Users\<username>\Documents\Paradox Interactive\Crusader Kings II\eu4_export\mod\<savegame>\localisation
- Open it with notepad and "save as" and make sure it is using the UTF-8 encoding
Linux:
- Go to your ck2 directory: cd $HOME/Documents/Paradox Interactive/Crusader Kings II/eu4_export
- Got to mod/<your-save-name>/localisation dir: cd mod/<your-save-name>/localisation
- To convert run: for file in *.yml; do iconv -t UTF8 -o ${file}.utf8 $file; mv ${file}.utf8 $file; done