I employ a mixed strategy when it comes to building a team. Certainly, with those who share my language and my native culture, I can easily communicate, and that means the process of duplication becomes much easier. However, doing so also limits my market and my audience, so at least some of my contacts will always be elsewhere in the world. I would say that I prefer about 80% of my team to be of similar language and background, with the remaining 20% be of international origin.
