Setting Up i18n in Your Application: A Developer's Technical Guide You've decided to expand your app to new markets. Your PM mentions "localization" and "translation" in the same breath, but as a developer, you need to understand what actually needs to be built before any translator touches your code. Internationalization (i18n) is the technical foundation that makes everything else possible. Without it, you'll end up with fragile, hard-to-maintain code that breaks every time you add a new language. Here's how to implement i18n properly from the start. Why Hard-Coded Strings Will Bite You Later Consider this seemingly innocent React component: function UserProfile ({ user }) { return ( < div > < h1 > Welcome back, { user . name } ! </ h1 > < button onClick = { logout } > Sign Out </ button > < p > Last login: { user . lastLogin } </ p > </ div > ); } Enter fullscreen mode Exit fullscreen mode This works fine for English, but what happens when you need German?…