You will not be required to speak Portuguese to apply for the D7 Visa. However, you will be required to have a basic proficiency in Portuguese if you wish to apply for citizenship through naturalization after 5 years or longer.

The government processing fees for the D7 Visa are fairly nominal. Depending on where you’re applying from, and on which SEF branch you visit for your appointment, you can expect to pay around €75 per person for the residency permits, and for the total processing costs to come in at around €450 per applicant (or [...]

Once your D7 residency permit has been approved by SEF, you’ll be able to access Portuguese public healthcare services in the same way that a regular resident would. You do, however, need to register with Portugal’s National Health Service (SNS) in order to gain access.

The exact time required to obtain the D7 Visa will depend on where you’re applying from and the application volumes at the time, however you can expect your application to be processed within as little as three weeks (or less). Your SEF appointment date, however, will likely only be set several months into the future. [...]

You can apply for the D7 Visa via your nearest Portuguese consulate or embassy in your home country. Once your application has been approved, you’ll receive a temporary D7 entry visa and a date for your SEF appointment. After this you’ll have to travel to Portugal for your SEF appointment, typically in either Porto or [...]

The D7 Visa is an immigration document enabling successful applicants to gain a 2-year residency permit and move to Portugal. Subject to the program requirements being met, D7 Visa holders can become eligible to apply for permanent residency and Portuguese citizenship after 5 years.