best advice I have is to look up the english term in thai2english.com
Then you will see pretty clear whether it is prime term, only term, one of many terms etc.
For example:
http://www.thai2english.com/dictionary/tattoo.html
you will see there is only one term for it, and you have the noun. The verb is different.
Whether the term originated as a translit is not really relevant. Only the term's popularity is relevance.