Currently the Light Phone interface is only available in English.
You can receive and view text messages from a variety of languages/characters, similarly to what you'd expect from a smartphone, but for outgoing messages, there is an English QWERTY keyboard by default.
A user can access alternative characters by long pressing on a letter, i.e. "à, á, â, ä etc." and there are also settings for AZERTY and QZERTY layouts.
We certainly want to be as inclusive as possible, so we hope to be able to expand the language offerings in the future, but we are still a very small team, and we don't have the resources to prioritize adding new languages as of now. Thank you for understanding.