info: translatable=no strings in metainfo/appdata files
It seems the appstream team decided to drop translatable="no" properties, and only support translate="no" properties.
https://github.com/ximion/appstream/issues/623
Some projects might report extra strings that already marked as translatable=no appear translatable.
One special case is the description block in MetaInfo files and release metadata. In MetaInfo files, each individual paragraph of a description (or enumerated entry) is translated individually, however, you can only exclude the complete block from being translated by adding translate="no" to the description element.
(Source: https://freedesktop.org/software/appstream/docs/sect-Quickstart-Translation.html)
Edited by Sabri Ünal