Due to my locale and my chosen profession, I frequently have to provide to brokers documents with certified translations. Tim has offered generally good advice....however, for a few reasons, I would not ask your broker if you need an apostille.
If you ask...the answer you get is likely going to depend on which person at the broker you ask...and you may happen to ask the person that tells you 'yes'. This is one of those things that it's easier to tell you to get it (and I'll be shocked if you actually are required to have it!).
This is important, because there is a drastic difference in the amount of work/headache/cost that obtaining an apostille will require as opposed to having a signed/stamped translation.
Where is the broker located? I've done this in a few different jurisdictions, and it's usually a pretty informal thing.
A few years ago, I needing something like this asap, and I used a company called Straker translations. It was a bit pricey, but it did the trick in a rush. If you google 'document translation services' you'll find a bunch. Many (if not most) will be able to do some official 'stamping' for you.
But the easiest route will likely be with a local attorney or notary (especially if you have a relationship with one)