Well, this is a tricky question.
On the one hand, Rome has contributed to the creation of some languages, such as Portuguese, Spanish and Romanian. Those languages were created from a mix of the local languages spoken before the Roman Empire and Latin. Undeniably, those languages would not have existed if the Roman empire did not spread to Spain or Portugal, so in that sense, the Roman empire contibuted to creating new languages.
On the other hand, those languages replaced previous languages. One of the most famous "victims" to the Roman expansion were the Celtic Languages in France, (Gaulish) Spain and Britain.
