|Depending on the module you are looking at, the interface could be different. Some modules are using a translation system specific to 1.7, while others are still using the former system from 1.6 version. In the end, it doesn't change anything for you, as you will be able to translate your modules just the same.|
1.7.6 version has come with a couple of bugs on this part of the back office, due to its rework. But rest assured, they are all addressed and being fixed for PrestaShop 1.7.7. You can have a look at it here and there!
The way email templates translations are handled is a bit different from the other translations.