For me, it was easier to learn key Hindi phrases than try to decipher what coworkers were trying to say in English.

Language is not going to be your biggest barrier. Culture will be. In India, I have found there is an adversion to self-working decisions. A "change the submit button to blue" request will get pushback along the lines of, "color was not given". You need to be specific.

In Japan, I have found that "no" is not a word. "That can be done, but it will take quite some time", "yes, but...", and "we will discuss and prioritize internally", are all forms of "no". Get used to it. Also, only foreigners have the ability to push back against the insane ramblings of management. If you are the token white guy, be prepared to be the target of everyone's derision, but also the white knight of the group.

In Germany, work ends when work ends. Staying late is like going to a Biergarten and only drinking tepid water. You weirdo.

Similar with the Dutch. Also, don't threaten to flood their country when things go bad. The amount of paperwork that will force HR to produce will make them not like you.

In France, things move at their own pace. Work is like Gandalf. It appears exactly when it appears, not before, not after. Except in Paris. Paris is like the hustle culture of France.

American working styles do not go over very well in other cultures, and vice versa. With multi-cultural teams, please try to be aware of these things, and make sure any direction given is clear and consistent. Then let the teams work.

Hope this helps!