Web accessibility (A11Y) is about making the web usable for people with disabilities, and it also benefits others with changing abilities, such as older people. Internationalization (I18N) and localization (L10N) are about translating web sites into other languages. UTF8 is a Unicode character set, which is now the dominant one used on the web, and it’s designed to include characters from just about every written language. Each of these topics are typically discussed in isolation from each other, but in this talk – after a gentle introduction to each of them – we’ll explore their interconnections. We’ll also take a look at what WordPress provides for supporting them in your work creating sites, themes, or plugins.