Requirements
The university's own pages we could read do not state these requirements yet. Check the official admission page.
English test waiver
NOVA's School of Science and Technology states plainly that all its bachelor's teaching is in Portuguese, with some support in English for foreign students only at master's and doctoral level. An applicant under the international student special competition must therefore prove knowledge of the language of instruction at CEFR B1 or higher, which for these degrees means Portuguese. The separate B1 English or A2 Portuguese rule quoted on the same page applies to exchange and mobility students, not to degree applicants, and the school recommends B2 English for those. No IELTS or TOEFL score is named for degree admission. NOVA's Faculty of Social and Human Sciences has run Portuguese courses for foreigners since 1997, in semester, summer, online and small-group formats, and those are the usual way to reach the level.