To translate FAQ plugin please follow the steps described in below-
Step 01: You like to translate FAQ plugin in to German language. FAQ plugin text domain is ‘bwl-adv-faq’. So, .po file name should be bwl-adv-faq-de_DE.po. Translate plugin texts using .po editor. It will automatically generate bwl-adv-faq-de_DE.mo file.
Step 02: Now, placed that bwl-adv-faq-de_DE.po & bwl-adv-faq-de_DE.mo file in 'lang' folder or in wp-content/languages/plugins/ folder. That’s all. You can check more country and language codes from below.