Unfortunately, even copy and pasting alone likely won’t get you anywhere. Once the proofreader has approved a translation, new suggestions from the community will not change the existing translation. The proofreader must first confirm the new translation. In order for them to review the translation again, a new suggestion is usually not enough; a comment explaining why the change should be made is also required.
Are there certain phrases that are repeatedly incorrect? Then it might be easier to discuss this using one example and then replace the term everywhere. This is definitely possible in Crowdin.