Not currently. The implication is that the person is in the middle of their turn, and needs to choose between the two letters, but that means that SA was already played in a previous turn, and while I’m unsure if SA is a proper two letter word in any language, I am sure SA isn’t a proper two letter word in English because my family had the list of two and three letter words in the official Scrabble dictionary, and SA isn’t on the list. Sh, si, so, and st, are.
The person taking their turn placed SA and is deciding between the last two tiles for their final placement. /joke