Language Support for the image buttons
There are four buttons in the standard Ecwid themes that have text on them. addtobag, checkout, continueshopping and placeorder.
e-shop designer should support the existing Ecwid languages for the "default" and "dark" theme. It could also provide language options for other themes.
Support for multiple languages would also be a bonus, however Ecwid does not fully support multiple languages yet. E.g. there is no support for product descriptions in multiple languages.
Languages are now supported via the “Options” button. The Bootstrap theme has less languages than the others, but I will add the missing ones over the next week or so.