I hate it, they translate a book and decide that they want to sell it twice so they split it into two. They did it with every book of A Song of Ice and Fire and yesterday I’ve discovered they also did it with To Sleep in a Sea of Stars. I hate paying twice for one book.
Both Lord of the Rings and Imagica started out as single books, then had to be split for later printings when they hit the limit of printing and binding.
I could see that happening with translations, there’s no guarantee the new language will be the same length or shorter, and GoT is long enough in English! ;)
I’ve seen special edition hardcovers split them too for the same reason:
https://www.foliosociety.com/usa/a-game-of-thrones.html