TNS International
In recent years, TNS grew immensely. 10 years ago, we had around 500 members world-wide, today we have that number of members outside the US alone (in addition to the about 1250 members in the US). So there is some interest in local meetings around the world, in members interacting - and in doing so in the local language, of course.
The organisation of TNS is very non-hierarchical, so there are no country chapters, but we do have local volunteers. If you are a member and want to know what sort of TNS action goes on nearby, or whether local meetings are planned, or if you're interested in becoming a member and you're not sure what to expect, seek out the local volunteer from your country in the list below and contact them.