Complex sentence: The design was adopted on 28 September 1917, according to the royal decree about the flag in that year; the Thai name for the flag is ธงไตรรงค์ ("Thong Trairong "), meaning"tricolour flag".
Split into simpler sentences: The design was adopted on 28 September 1917, according to the royal flag decree. The Thai name for the flag is ธงไตรรงค์ ("thong trairong "), meaning"tricolour flag".