While GiveWP does provide some level of support for multilingual sites, it still lacks some details to fully run a multilingual donation site.
For example, the Multi-Form Goal Block, the Multi-Form Goal Shortcode, and the Give Totals shortcode do not display combined totals for forms in different languages, if the site uses Polylang.
There's no way to combine totals, donors, and the number of donations in multi-step forms.
Test added via JS cannot be translated into multiple languages on the same site. This includes some strings in multi-step form templates and most of the strings in the donor dashboard.