Keyboard layout changed, problems for mcd

... Hello!

 A problem has arisen. Yesterday I added a language to my microsoft word 2010. Everything seemed ok. But when I launched mathcad 15 the keyboard layout changed. That is, there is no longer any correspondence between keys and commands, for example if I click on control +, instead of the = ,I get the while etc. ...Can any of you tell me what to do? I'm sure the thing is simple.

Thank you very much

MF