Change TomatoCart Checkout Form Display English To Thai

I am running TomatoCart, and it works great. But our customers are Thai, and we are able to publish all of the products in Thai already. But the "Check Out" form in the cart, one of the last steps, is in English. I have gone into MySQL, as well as the PHP, but I have not found exactly where we can "manually" change the values of Checkout Method, First name, Last Name, Shipping, etc. into Thai. Thai is a UTF8 language will work fine here. There are no Thai Language Packs ready in the Tomato Cart project yet. We have signed up to join their translation project but their system isn't working and it will take too long for them to deploy a full translation and all we need is just the checkout form labels in Thai. I want to pay someone to locate and successfully change the English text to Thai text on the checkout form only. It's not a huge project, just find it for us, where to change this. We can do the editing ourselves after that. Tomato Cart is very easy to install, so you can run it or use our test version. I would like to repeat we do not need you do the editing, just to find the place (hard coded file, JSON, XML, MySQL field) where we can change the form field labels and possibly the navigation menu. The budget for this is $30 or less and I want to do this fast so I will be checking my PM and awarding based on how relevant your responses are. I don't ask you to give me the answer before I award, just to see you have checked on this a bit before just sending an "I can do this sir" email. If you download TomatoCart from here: [login to view URL] and install it, and show me a working copy with the field edited on your server or a screen shot in your development environment that's also a fair way to prove you have it, and win the $. I have attached the screen shots of which areas I am trying to edit. Unlike many bids on here, this one is ready to move forward, you can see my past projects and how quickly we finish them. I am a Linux engineer and run an Internet Hosting business, so this will be easy for both of us.