Localization (l10n), is the process of adapting applications and text to enable their usability in a particular market. From a dev standpoint, what immediately comes to mind is translating strings instead of hardcoding them - but there's much more to the topic. In the talk, I want to cover the following: - Different approaches to managing translation strings, and different libraries / tools which do that with React. - What mistakes can happen during localization and how to prevent them. - Through which services can I get my app translated, and explain a little about how translators themselves work. - What should I (not) do to help translators deliver quality translations. - At which points in the development process we can localize (coding, or perhaps already in design phase?). After the talk, I want the audience to have and understanding what tools are available to them, how to approach SW localization and how to (not) do it.