grenv: 'Drop' makes loads of sense and it's well established as part of Backgammon terminology, but I take your point. Once you've got used to the words, whatever they are, it's second nature and you can't see what the fuss is about. I'm still cautious with these BK buttons, don't want to go the wrong way, but I'll get there, as will Rose and everyone else... I suspect that I'll eventually not go to the word but will learn that left is take/continue and right is drop.

At Vog the words "Take" and "Drop" are used. perhaps because they are short and fit onto the board in the area that's provided. When playing GnuBg I don't read the words (Accept and Decline) as they're are rather small on my monitor, but hit the green tick or the red cross as appropriate. I think such icons would go nicely with the indistinguishable grey buttons here.

Why not change "check" to "I can take your king next turn"?
They could at least spell it properly - cheque.