Editor translation keys missing

Some editor text cannot be translated, eg.: "The content was restored from an automatically saved draft. Click to clear draft." "No Results" when searching for emojis When turning on "View word keys?" in Translation Tools, not all keys are shown in editor (event for phrases that can be translated)
Status: Moved to Github
I'm on 5.0.3 and just finished translating the editor. Problems and phrases I found that cannot be translated: Translation Tools->View word keys?->TRUE does not show word keys in editor In emoji/icon picker: "All icons (2060)" "No Results" Names of default emoji categories (eg. "Smileys & People") In text size dropdown: "100% (default)" All color names in text color dropdown All text in link add/edit dropdown In "More formatting options" dropdown: "Default" font style "The c