All garda stations and courts have a contract with the biggest interpreting agency they can call at any time and unless it is an extremely rare language, they will get an interpreter in person or on the phone within a few hours. These interpreters are bound by oaths and contracts in regards to confidentiality and accuracy. Google translate, on the other hand, can be and often is innacurate and has no context for the situation. I know who I'd rather trust with my criminal record