ʻIngʻō̜n Suphanwanit

• Phuying kap sangkhom
• Wannakam kap sangkhom
• Wiwattanākān ʻaksǭn læ ʻakkharawithī Thai
• Wiwatthanākān ʻaksō̜n læ ʻakkharawithī Thai = Development of Thai scripts and orthography