Certified Korean Translator, Korean Interpreter, Chinese Translator, Chinese Interpreter - Ko & Martin

“I have worked with Lingling for many years. I first met Lingling when we were both court interpreters working on the same case in court. I was impressed with the quality of her interpretation. After I passed the bar and became an attorney, I continued to employ Lingling as an interpreter for many of my cases. I worked with many interpreters and Lingling is one of the most competent and conscientious Mandarin/Chinese interpreters I know. I have recommended and will continue to recommend Lingling to anyone who is in need of a Mandarin/Chinese interpreter.” - Aster Chang, Attorney at Wasserman, Comden & Casselman LLP

“LingLing served as simultaneous interpreter for a day long seminar last year which I taught at UCLA to a visiting group from China. Her language skills were impeccable; she worked seamlessly with me; her understanding of technical/business/financial terms was excellent, and she was always personable and pleasant. I would say she is the best interpreter with whom I have ever worked.” - Mark Buchman Independent Banking Professional

More Endorsements of Lingling
More Endorsements of Soomi

“Hands down, Soomi is the best Korean interpreter around. There are no other interpreters I know who can handle Korean-speaking witnesses at trial like Soomi.” - Ekwan Rhow, Partner at Bird, Marella, Boxer & Wolpert

“Ms. Ko is simply the best Korean interpreter available in Southern California, no matter the context.  She has interpreted numerous depositions for me both taking and defending depositions. Her skill and experience, her command of legal and business terms and her cultural sensitivity (especially to business executives) makes her particularly valuable in preparing clients for testimony and counseling them during legal proceedings.” - David Parker, Partner at Parker Shumaker Mills LLP

Certified Translation and Interpretation
25 Plus Years Experience, Over 2,000 Cases

High Profile & Complex Cases  •  International Litigations  • 
Overseas Depositions  •  ITC Trials  •  Patent Infringement Cases

Interpreters & Translators

Soomi Ko, Korean Translator Southern California, Korean Interpreter Southern California

Soomi Ko

Principal Korean Interpreter & Translator

  • California State Certified Court Interpreter #300732
  • U.S. Federal Court Approved Interpreter
  • Professional Conference Interpreter
  • Certified Translator
  • 14 years of experience as a professional interpreter and translator
Lingling Martin, Chinese Translator Southern California, Chinese Interpreter Southern California

Lingling Martin

Principal Chinese Interpreter & Translator

  • California State Certified Court Interpreter #301082
  • Texas State Licensed Court Interpreter #1608
  • Delaware State Approved Court Interpreter
  • U.S. Federal Court Approved Interpreter
  • U.S. State Department Contract Interpreter
  • Professional Conference Interpreter
  • China Nationally Certified L-2 Translator
  • 14 years of experience as a professional interpreter and translator


Ko & Martin is comprised of a group of highly qualified Korean and Chinese interpreters and translators who have proven their competency and reliability. The interpreters and translators who work with Ko & Martin were carefully selected based on their performances. Ko & Martin offer language services for cases that call for one interpreter to complex litigations where multiple interpreters/translators are needed concurrently.

Ko & Martin understands when it comes to intellectual property and complex matters involving foreign clients or limited English-speaking parties, accurate interpretation and translation is particularly critical. We strive to provide high interpreting competency, cost-effectiveness and timely delivery of translated documents throughout the litigation process. With our combined experiences of over 25 years and more than 2,000 cases, Ko & Martin has proven to deliver supreme language support that our clients count on.

In addition to legal interpreting, Ko & Martin also provide simultaneous conference interpretation for international conferences, business meetings and network broadcasting shows. We have up-to-date knowledge in a wide variety of industries such as IT and other technology, finance and securities, marketing and advertising, entertainment and media, real estate and investment, maritime and international trade, medical and healthcare, engineering and heavy equipment, and more.

Accurate, impartial, confidential, you can count on us.

Let Ko & Martin be a part of your team.