Allow specifying preferred language for checkout

Lemon Squeezy’s checkout already supports multiple languages, which is great! However, the automatic language detection isn’t always reliable — many users still need to manually switch the language.

The problem is that the language selector is quite small and easy to miss, so some users get confused when the checkout shows up in the wrong language.

It would be super helpful if we could set a preferred language when creating a checkout (e.g. via the API), or pass it as a query parameter in the checkout URL (like ?lang=en or ?locale=en).

Most merchant systems already know the user’s language beforehand, so this would make the checkout experience much smoother.

It is one of the biggest problem for people from a non-English speaking country. I think it will affect my business but I still couldn’t find a better solution for my SaaS other than Lemon Squeezy. It is a very easy feature to add but I don’t know why they haven’t added it already. I am implementing Lemon to my project at the moment and hoping for a fix at the future.