What RTGS romanized Thai nickname is listed for Thailand's national flag?

The RTGS romanized nickname listed for Thailand’s national flag is Thong Trai Rong.

The Thai name is ธงไตรรงค์, romanized in the Royal Thai General System as “thong trai rong,” meaning “tricolour flag.” The design has five horizontal stripes: red, white, blue, white, and red, with the central blue stripe twice as wide as the others.

King Vajiravudh, or Rama VI, introduced the present design on 28 September 1917. The colours are commonly associated with Thailand’s nation, religion, and monarchy: red with the people and land, white with religion, and blue with the monarchy.

A common mix-up is Thong Ratcha Nawi, which means “Royal Navy flag.” That is a naval ensign featuring a white elephant inside a red disk, rather than the country’s standard national flag. Thong Chang Puak refers to an earlier white-elephant flag.