Finally I managed to update my language files, previously I updated only PO/MO in the wp-content/plugins/wpforo/wpf-languages/ folder from the plugin ...

Hi, So I try to answer your questions: Yes it is a multi-language website and by default set to French in WP admin panel. Any plugin automatically swi...

Sorry but this is not possible. There is only english language in the front-end phrases admin panel.I can't select french language and when I modify f...