Sorry it took me so ling to respond, been bent over from laughing. My wife who graduated from technical college once asked me “why are there two” as she pointed to the moon on an early evening when both the sun and moon were visible. And she, like the vegetable salesman at Rumpoh market in Pattaya, do not know the name of any vegetable, they just say “si kyao” or green. She does know the names of most Thai fruits. And rivers, streams, lakes, ponds and all bodies of water are “nam”. So I definitely agree she is literate, at least compared with our two year old.