The message readinglists-import-app-with-link¹ in WikimediaMessages is: <a href="$1">Download</a> and install the latest version of the Wikipedia app:
It includes HTML code. All translations that include <a href must be reviewed manually for security reasons (see the parent task), which is time-consuming and error-prone.
In addition, this code is the same in all the languages, and translators shouldn't have to just copy it.
It would be great to remove this code from the message entirely. A good solution is to move the "Download" part into another message, then wrap it in the HTML element in the JS code, and insert everything into the main message as a parameter.
¹ In translatewiki, its key is wmf-readinglists-import-app-with-link.