Another method that Indian staffs use is they find Thai staff who fluent in English to help translate the English to Thai.
In the other hand, Thai staffs also have the difficult toward English of Indian staffs.
They mention that the Indian speak English very fast and their accent is difficult to understand.
Since Thai people is concern about their face.
They don't want to lose their face because they didn't understand the English so while they don't understand the conversation or not clear it in some part, they do not speak out that they didn't understand it to the Indian staffs.