I've updated my Dutch translation to 100% of the current 7.7.1 release on the base of the .pot file that is in the language folder. In fact 2.365 lines of text.
But translating and correcting needs in fact .po files next to the .pot file to be present in the language folder. Now I used my previous translation as base, next to the new .pot file.
Please put the language files in the language folder of the plugin.
The .pot file includes all translations for add-ons. WooCommerce has a lot of text. I would advize to keep translations with actual sources.