How do multinational law firms make use of their associates/solicitors practising law in more than 1 country?

I mean, what sort of stuff do multinational law firms make their associates/solicitors/lawyers, which practise law in several countries, do? I'm sure it's an advantage for a lawyer to have several legal qualifications.

In fact, multinationals engage associates/solicitors/lawyers in their offices in each country and only a few top are trained in international law and laws of different countries.

If you have a case load it takes care of itself. The Paralegals do most of the work unless they go to trial.