This message says "Number of entries on watchlist should be shown". This suggests that, when activating this option, the number of entries should appear as an actual number, like 25.
However, it would seem that this actually refers to the number of entries that are shown, i.e., showing 25 lines of watchlist entries. But that is not what this message says (and the first wrong translations have already appeared).
Suggest changing this to "How many watchlist entries to show".