Transfer translations

Hello, I always use your plugin to translate sites and am very pleased with it. Now I have faced one problem, I hope you will help me solve it. The site has been translated into German using loco translation. The essence of the task: to change the language of the site to German (formal) and transfer woocommerce and german market plugins translations from the German language to German(formal) (only changed lines). I know that I can replace the contents of .po and .mo files, but I need to transfer only those lines that have been changed, and all the rest to remain as they are in the German (formal) by default