Does it matter? Maybe you should check English, Chinese and Spanish for some really offensive stuff, but past that... would it bring more money than a week or so of someone's work would cost?

The answers to those questions should be known concretely at least.

You never know when you start out a company. Maybe you'll never get any profit and it doesn't matter. Maybe you lose out on a few millions out of billions... and maybe it still doesn't matter? Then you can still release a locale-specific version if it becomes a problem.

Maybe you lose out on Brazil.