Block: Miner;
Place: GUI, Chat
Hardcoded entry: Workgroup related tooltip, chat messages.

UPDATE:
Block: Electrolyzer.
Place: JEI Electrolyzer Category.
Hardcoded entries: Recipe type entry, Energy entry.

@CrossVas
"gui.ic2.miner.workgroup": "Create/Remove Workgroup",
"gui.ic2.electrolyzer.energy": "Energy: %s EU",
"gui.ic2.electrolyzer.dual": "Type: Dual",
"gui.ic2.electrolyzer.charging": "Type: Charging",
"gui.ic2.electrolyzer.discharging": "Type: Discharging",