One hard requirement for my geography is having i18n support for at least the client-facing parts. My local clients speak French, and sending them an English invoice is pretty rude, but I also have English-speaking clients, and sending them an invoice in French would be incomprehensible.
Does your software support that use-case? Most of them don't; I'm honestly thinking about building my own at this point.
I have the i18n feature but haven't included French (yet). Language switch is only visible in countries where I've enabled it and where there are more than one language. Besides sending out invoices to customers in French, which other elements are critical for you to be i18n'ed?
I can add support for French in a few days – if you sign up :)
I haven't looked at how it's done in your app, but I'd encourage you to make that switch visible for everyone, because you could have e.g. a Spanish person working from the US.
Critical elements are everything that the customer will see: Mainly invoices, but also client area (if you have this), payment page, proposals, emails, etc.
And thanks for the offer, but I've already found something that suits me (Pancake), so I'm not really looking to switch at this time. Just reminding you of something that Anglo-centric devs often forget!