How to translate label "updated_at"?

Tables\Columns\TextColumn::make('updated_at')->translateLabel()

Tables\Columns\TextColumn::make('updated_at')->translateLabel()

Tables\Columns\TextColumn::make('updated_at')->translateLabel()

Tables\Columns\TextColumn::make('updated_at')->translateLabel()

My language json has:

"Updated at": "My translation..",

"Updated at": "My translation..",

"Updated at": "My translation..",

"Updated at": "My translation..",

This solution doesn't work - my label remains untranslated ("Updated at").
Other translations work.