Translation key indexnumber

Development
1

Hi I want to use the indexnumber in a translation key.
See below in the code:
key=f"is_smart_charging_enabled_{i+1}“,
name=f"Charger {i+1} Is Smart Charging Enabled”,
This naming works if the is no translation, but how can I add the index number in the translation .json file like below.

 "is_smart_charging_enabled_": {
                "name": "Staat slim laden aan"

FrankEnergieEntityDescription(
                key=f"is_smart_charging_enabled_{i+1}",
                name=f"Charger {i+1} Is Smart Charging Enabled",
                translation_key=f"is_smart_charging_enabled",
                authenticated=True,
                service_name=SERVICE_NAME_ENODE_CHARGERS,
                icon="mdi:flash",
                value_fn=lambda data, i=i: (
                    data[DATA_ENODE_CHARGERS].chargers[i].charge_settings.is_smart_charging_enabled
                    if DATA_ENODE_CHARGERS in data and data[DATA_ENODE_CHARGERS].chargers[i] else None
                ),
                attr_fn=lambda data, i=i: {
                    "settings": data[DATA_ENODE_CHARGERS].chargers[i].charge_settings
                    if DATA_ENODE_CHARGERS in data and data[DATA_ENODE_CHARGERS].chargers[i] else {}
                },