Language isn't enough. Let's look at a purely western example - implementing a billing system for a company serving the US market. A developer from the UK will

Language isn't enough. Let's look at a purely western example - implementing a billing system for a company serving the US market. A developer from the UK will assume that every bank account holder can do free, easy and instant wire transfers, yet in the US that's (still!) not the case and most people use Zelle or Venmo or PayPal for those things instead, which now significantly increases complexity (both engineering and potentially regulatory).