"Ja" is the informal rural equivalent of "Ka", which is used here as an acknowledgement. "Ja" may have been interpreted as improper in this context, as it is n

"Ja" is the informal rural equivalent of "Ka", which is used here as an acknowledgement. "Ja" may have been interpreted as improper in this context, as it is not formal. Language is something different to Thais - the West does not really have an equivalent, which probably makes this confusing to some. For instance, royalty in Thailand have a whole unique language that they, and their servants, converse in (Ra-cha sap). The only thing I can think of that's even close is the use of Latin in Catholic churches.