First consideration, they have no right to this information. It's a fishing expedition to see how much time they have, or more likely what bargaining position y

First consideration, they have no right to this information. It's a fishing expedition to see how much time they have, or more likely what bargaining position you are in. Some companies will even keep their 2nd and 3rd choices dangling in 'consideration' until they hear back from their first choice. Next consideration, very short terms of employment look bad. You will likely need to have an explanation for this. Last consideration, what's the right thing to do and what's right for you at this time. This is something you need to decide. For me, let's assume I have gotten an offer letter, accepted the offer, and started work. Then for me that means that I have made a deal with the company that's good for 1-2 years (I typically won't leave before at least that time). That deal is off if items in your offer letter are not delivered. So, if it was me and your'e at that point, I would tell the German based company that you accepted an offer that came in, that your current tasking is one (or two) years and you'd like to keep the door open because things can change. They know that if they wanted you to not accept other offers they needed to move quickly, so they shouldn't be surprised.