Contracts come with templates for the US, UK, Canada, and Australia. We also have a generic contract where you can edit the entire text that can be adapted for other countries.
Our Proposals, Time Tracking, and Invoices can be used in any country, and we support over 100 currencies.
If you'd like to get paid outside of Bonsai, you can also do so by giving your bank details to your client. You can set this info from the Payments section in Settings.
Bonsai's interface is currently only available in English.