Can you use Google.com in the language that you already chose?

By the way, under the search engine in Google how many language options does it give you?

If you are in Germany let’s say, you click on IE, Google comes on, you click on English, and then, you click on Google.com (at the right bottom of Google homepage, or you just go to Google.com.) Does the language option change to German on you just because you chose dot com, instead dot.de? This is not not necessarily about Germany by the way.