Okay people, logs should not happen now.
If you wanna change languages, go to the "steam_settings" folder, edit the "language" entry of configs-user.ini to one of these strings:
english: for English
french: for French
german: for German
italian: for Italian
spanish: For Spanish - Spain
brazilian: for Brazilian
russian: for Russian
schinese: for Simplified Chinese
tchinese: for Traditional Chinese
japanese: for Japanese
koreana: for Korean
latam: for Latin America Spanish
Save the .ini file, then boot back into the game. It should work now!