Minimum English language requirements:

Test of English as a Foreign Language (TOEFL): A minimum score of 600 (250 computer based, 100 Internet based) in the Test of English as a Foreign Language (TOEFL) administered by Princeton University, with Test of Written English at 475 +.
http://www.ets.org/toefl

International English Language Testing System (IELTS): Test Patterns A and B, with an average score of 6.5 over all components and a minimum of 6.00 in each band.
www.ielts.org

University of Cambridge: Advanced Certificate, Grade B or better (CEFR Level C1 or C2) Proficiency Certificate, Grade C or better (CEFR Level C1 or C2)

English Test for Academic and Professional Purposes (ETAPP): With grade C1 or better (CEFR Level C1 or C2)

Pearson English language text (PTE) - minimum requirement of 63 (with no section less than 59) 
https://pearsonpte.com/

Maynooth University's TOEFL code is 8850

Divine Word School of English, Maynooth, Co. Kildare, offers English language courses: http://dwse.org/