2 hours ago, Dionigi said:

1968 convention (original)

The convention had amendments on 3 September 1993 and 28 March 2006. There is a European Agreement supplementing the Convention on Road Traffic (1968), which was concluded in Geneva, on 1 May 1971.

Note that before 29 March 2011 the convention demanded contracting parties to recognise as valid for driving in their territories:

• any domestic driver's permit drawn up in their national language or in one of their national languages, or, if not drawn up in such a language, accompanied by a certified translation;

https://en.wikipedia.org/wiki/International_Driving_Permit

This validates many European licenses without need for an IDP.

34 minutes ago, stevenl said:

This validates many European licenses without need for an IDP.

 

None of that has anything to do with Thailand. Thailand is not in Europe.

 

And the part about the language of the license was removed from the treaty in 2011. And the only national language in Thailand is Thai so doubly irrelevant.