https://wordpress.org/support/plugin/polylang-supertext/reviews/?filter=4
[Supertext Translation and Proofreading] Reviews | WordPress.org
translation and proofreadingsupertextreviewswordpress
https://support.crowdin.com/de/enterprise/translation-proofreading-by-vendor/
Translation and Proofreading by Vendor | Crowdin Docs
Configure translation and proofreading by vendor in your project workflow
translation and proofreadingby vendorcrowdindocs