Some of the possible connections…..
The verbal clue translates “Not to Scare you.” Or “Not to give you fright” In Welsh.
It’s also in a traditional welsh lullaby called Suo-Gân.
The lullaby is also sung in a movie called “Empire of the Sun”
Is also used in several other types of medium, songs.
I’m guessing, “Total War: Thrones of Britannia”.
Since that game is about the war of the British Isle, and wars were fought between the Anglo-Saxons, Gaelic clans, Welsh tribes and Viking settlers