Reasons to set up somewhere else or make a subdivision/franchise/similar setup
Cheaper cost of doing business.
In this case finding continental French translators is harder than you might like in the US where there are one or two in France, even more so if you add in Italian, German, Spanish and maybe look at some of the others that are scarcely represented at all in the US (
https://www.loekalization.com/ has some nice stories) and any that are there are usually medical or patent experts.
I don't know that a programmer in any of those is notably more cheaper than it is in the US and Canada, could be in eastern Europe but we don't tend to see that one.
Taxes and tax breaks for places make it viable.
Legal requirements are easier to fulfil. Be it because lawyers are present there or because there is some law that says those here can do more.
If you are making optical discs or carts and something goes wrong you can wander down to the stamper's/printer's and slap them yourself, and not have to stick it on a plane or rely on photos. Likewise if made within a free trade region (or functionally one) there is also that.
Currency exchange makes it worthwhile, be it avoiding the costs of, stockpiling some during a particularly bad/good period to avoid losses that way and possibly taxes involved with sending things back (see the tax holiday many businesses in the US clamour for, even if it is them dodging it* in the first place).
*standard tech/pharma/chemical product play. Do first design in the US, subcontract to Europe to finish development because cheaper cost of science types, subcontract to build it in Asia because cheap labour, send all the money back home and throw big party because you did not have to pay US labour rates and deal with US environmental regs. The US government knowing this however taxes this money coming back in, hence the companies calling for a tax break on it as they can often end up with millions and millions, if not billions for some, sitting overseas.
There are however overheads, setup costs and probably those that already did it willing to do it for you for a fee/cut (give me a hit game in the US and Japan and fund the production and I will charge a very small fee/demand a very small cut if the risk is that low) so you get to balance it against all that.
