Update German and Indonesian after analysis

Fix Turkish target_child_sex column loading issue

Fix Dutch target_child_sex column loading issue

Add Basque, Cantonese, Croatian, Danish, Dutch, Estonian, Farsi, Hungarian, Icelandic, Indonesian, Japanese, Mandarin, Turkish

Fix German

Remove test sets and use constant size for validation

Update English and German

Add Spanish

Add English, French, German and update README

Initial commit

initial commit