Building React custom data visualizations with full international support is not always easy. This past year, I’ve worked to add new data visualizations features and modify legacy visualizations, for an international audience - on my team at Adobe. It’s been a learning process to correctly format strings, numbers, dates, times, currencies, calendars, x/y axis, and more! In this talk, I will share some of the useful techniques I’ve learned about customizing data visualizations for a global audience. With a focus on React and high level ideas to keep in mind when designing, coding, testing, internationalizing, and localizing data visualizations for the world!