Analysis of information sources in references of the Wikipedia article "Tai Tham script" in English language version.
The reason why they called this language 'Kammuang' is because they used this language in the towns where they lived together, which were surrounded by mountainous areas where there were many hill tribe people.
The reason why they called this language 'Kammuang' is because they used this language in the towns where they lived together, which were surrounded by mountainous areas where there were many hill tribe people.