Editor Localization: How does it work?

Hello, Does anyone know how localization works inside the Unity editor? For example if I download Unity in language A and write an editor extension in language B (or visa versa). Will Unity display that editor in the installed language or in the original written? As far as I can tell you can't change the language of the editor anywhere other then when you install Unity. (Edit: it may use your system's language i.e. Application.SystemLanguage (read-only)) If the editor does not automatically localize editor text do I have to make sure all the editor extension's code goes through LocalizationDatabase for things such as button names, label fields, etc... I would like to publish an asset on the asset store with localization options. Thanks.