I am the plugin author for Tainacan. In our community forum at https://tainacan.discourse.group/t/offer-to-contribute-to-the-french-translation/1229 we received a generous offer to help translating our plugin and theme. Please add the following WordPress.org users as translation editors for their locale:
- https://wordpress.org/plugins/tainacan
- https://wordpress.org/themes/tainacan-interface
If you have any questions, just comment here. Thank you!