PrasannaKumar Muralidharan I don't quite get your point... Why should the communication between two German native speakers happen in English?

At least at my current company, we embrace English as lingua franca. Every written documentation has to be done in English. We have colleagues from India, Russia, China, etc. working at our office (HQ in Germany). And even if everyone is able to speak German, we often default to English, because it's easier for technical talks.

Before working for Bosch CI, I worked for an automotive company (steering systems). Even there we kept all the docs in English. We tried to communicate in the native language of our customers (by opening affiliated companies in each country). As a matter of fact, we only used German for German customers, like Daimler and Audi. We had offices in Yokohama for Toyota, Plymouth (MA) for Dodge, Pune for Tata, and so on.

I have seen a couple of automotive companies (both public companies - one listed in USA and another in Germany). Their customers are Audi, BMW and other big car manufacturers. Most communication happens in German even when Indians were involved. Our experiences differ but both are valid.

Another interesting fact that I would like to point out here.

• Poincare conjecture remains "Poincare conjecture" even after proved.
• Taniyama Shimura conjecture becomes Modularity theorem after proved.
• Ramanujan number gets referred to as Hardy-Ramanujan number or as taxicab number.

If you notice the above three a Japanese or Indian name changes but European name stays as such.

Similarly Japanese companies are expected to accept employees who can speak English but many French, Greman or European companies are not.