Does the presence of other language text slows the machine translation speed of SDL?

Hello SDL Community Team, 

I have this query in mind, as to whether the presence of 2 different language texts, for example English and Bhasha in an MS Excel column, can be the reason of slowing down of the speed/performance of SDL MTC tool? If not what could be the underlying reason for this slowness in speed. Is it due character limit per translatable file? Please shed some light here

Please revert if you need any further information.

Thank you in advance,