Civil law capacity to commit a tort means the ability to be held liable under civil law for one's own unlawful conduct, i.e. to become liable to pay damages.
( with due acknowledgement to Bettina's answer)

No need to indulge in delinquent delictuality, nor tortuous tortiousity, nor quote Roman-Dutch and Scots law when Roman law died out in the early Middle Ages throughout Europe generally, and even the Dutch had adopted the Napoleonic Code by 1809; and particularly as Martina's text involves her native Austrian legislation.

In the field of civil law, the capacity to commit a civil offense - like the capacity to contract - is part of the capacity to act. Here, too, the limit on the capacity to act, which is set at the age of 14, is intended to protect young people from the harsh grip of the law.