... it is just not realistic to learn another language to be able to support them ...
It is quite common in Europe to speak two or three languages fluently. If there are 2 - 3 engineers who speak 2 - 3 languages fluently then most of the major languages are covered.
By the way, it is often just a stereotype that all people are drunk here or there. Brazil economy grew 2.5% in 2013, it is certainly achieved by hard working people.
I live in Europe and I speak two languages fluently but I still believe it's completely impractical to learn all the languages when supporting a global deployment of systems or network devices. If you had to interface with users, then I would agree - but that isn't the case here.
Anyway, if you read the article the problems they encountered had nothing to do with language:
"Unfortunately, this was during Carnival. The local phone company did not answer, and the local employees did not answer their mobile phones. After two days we got someone from the phone company on the line — and they were too drunk to understand us."