We've added translation support to OpenInfraMap and we now have a project up on @weblate if anyone wants to help translate:
https://hosted.weblate.org/projects/open-infrastructure-map/web-frontend/
If you have any comments, best to join our Matrix channel (https://matrix.to/#/#osm-infrastructure:matrix.org) or IRC (#osm-infrastructure on OFTC).
Translations in German, French, and Greek are mostly complete and now live (language is selected based on your browser language). The basemap labels are also now selected based on language.
If you want to translate to your language, you can create a new translation on Weblate!
@OpenInfraMap This afternoon I completed the Spanish translation. I hope you find it useful. Greetings and thank you very much for making this project possible.