Add support for people to translate chat/botwidget tooltips, buttons and basically all the words inside. Easy way to do this would be to include a "custom" button where you could modify all the possible scenarios. There could be presets, or just allow user to do custom. This would generate a custom .js file that would be used for that translation. Including a "remove" button also, would revert back to basic en-EN.
If you will do this at some point, i'd be more than happy to help with translating stuff to Finnish.