The interpreter or translator is matched to the subject of your task — terminology matters as much as the language pair.
Medical
Clinic appointments and consultations, medical reports and discharge summaries.
Legal
Notary and court visits, contracts, powers of attorney, corporate documents.
Technical
Plant and site visits, equipment commissioning, manuals and specifications.
Financial
Meetings with investors, financial statements, business plans.
Name the subject in your request and attach the agenda or a glossary if you have one.