My toilet and bathroom are attached so i can speak in the bathroom or not?

بسم الله الرحمن الرحيم

It is not good to speak in bathroom:

ویستحب ان لایتکلم بکلام مطلقاً  (شامي، ط زکریا، 1/291)  

And, if the toilet is also attached then there one should be more cautious since speaking in toilet is makrooh (undesirable) whether one is there for calling ones nature or not. In Shami:

ویکرہ الکلام في الخلاء وظاھرہ انہ لایختص بحال قضاء الحاجة و ذکر بعض الشافعیة انہ المعتمد عندھم (شامي، ط زکریا، 1/557)

Yes, if there is a dire need then one can speak to an extent that is necessary.

Allah knows Best!

Darul Ifta,