The translation system now (as of March 2021) is rather outdated. Translation is currently not a prioriy and a new system will be set in place. For the time being it is recommended to wait with your translation efforts.
The bot user interface supports dynamic language change. The system is rather simple but it does work.
If you want to see the bot localised in your own language or any language you know, you can contribute to the TravBot translation spreadsheet. I do update the spreadsheet with new phrases as the developement goes on.
You can also be credited for you work once I create an about section in the bot. Provided you let me know that you helped :).
Translation spreadsheet ⇢