Porto is a business/financial centre. Some hotels have conference rooms, some with internet.
Basic Portuguese language is very much appreciated. English, French, Galician, Catalan, Italian or Spanish may be spoken or understood at major hotels/resorts. For major tourist attractions such as river boat rides or Port Cellar tours, generally the chosen language for a given tour slot is granted on a first-come-first-served basis, if you want a tour to be guaranteed to be in your language, turn up early and request it.
The Fast Forward Language Institute (http://www.fastforward.com.pt/), in the centre of town, offers a variety of courses in Portuguese language and culture including 3 hour "Portuguese for survival", aimed at foreign visitors to the city.