Sorry ignorance of the law is no fault of the law.. Agree its unusual to be arrested for such an offense but saying I didnt know the law is not going to cut you any slack anywhere.. Also not being able to speak the local language is hardly the fault of the officers in question..
Often Thailand does odd things or incorrect systems but in this case what did the poster expect..
As to what should they have done (language, signing forms, posting bail, etc) how about hiring the services of a competant lawyer ?? Having to spend a night in the Police cells (not jail) well whoop de doo.. I dont consider you have ever really been to a town until you have had night in its nick
