Flutter Internationalization: translate list items (in JSON?)

I have this widget in Flutter/Dart:

  Widget _buildTimeRow() {
    var keys = widget.place!.openingTime.keys.toList();
    var length = widget.showFull! ? keys.length : min(keys.length, 5);
    return Container(
        child: Column(
            children: List.generate(
                length,
                (int index) => Container(
                      child: Row(
                        children: <Widget>[
                          Container(
                            width: 100,
                            child: Text(keys[index],
                                style: TextStyle(
                                    fontWeight: FontWeight.w500)),
                          ),
                          Expanded(
                            child: Container(
                                child: Text(widget.place!.openingTime[keys[index]] ?? "",
                                    overflow: TextOverflow.ellipsis)),
                          ),
                        ],
                      ),
                    ))));
  }

The problem is that I can not translate the Text(keys[index] part.

I tried adding this:

                  if (keys[index] == 1) ...[ // 1, 2, 3, 4, 5, 6 and so on.
                    Text(Localized.of(context)!.trans(LocalizedKey.NewWord) ?? "",
                      style: TextStyle(
                        fontWeight: FontWeight.bold,
                      ),
                    ),
                  ],

This does not work. How could I get it to work so that I can translate the outcome of the list items (in the index) to be translated?

Is this even possible?