Use existing key in other translate Localizely

Question

In localizely I have few translate key with their values. I want to set new key with ICU Select where I want to use existing translations.

How can I use existing key in other translation?

I have ICU Select key like that:

{section, select, documentsSection {Document Section} favouritesSection {Favourites section} newsSection {News section} settingsSection {Settings section} other {Section}}

And I need to use existing translate value (key) instead String "Document Section".