The results of searching for "boarding school": 5 English-speaking places
There are also organizations that speak other languages: French, Russian, and Spanish.
Praça João do Rio 7 1000-166 Lisboa Portugal
Rua de Gaza 108 2775-357 Lisboa Portugal
Rua Lagoa 171 2645-344 Lisboa Portugal
Rua António dos Reis 95 2710-144 Lisboa Portugal
Avenida Almirante Gago Coutinho 73 1700 Lisboa Portugal