The Greek that is translated as “mediator” in English is translated in Mandarin Chinese as zhòng bǎo (中保), lit. “middle protector.” (Source: Zetzsche)
In the Chichewa interconfessional translation (publ. 1999), it is translated as “one who stays in the middle” (Source: Ernst Wendland in The Bible Translator 2002, p. 319ff. ).
See also mediator (Job 33) and complete verse (1 Timothy 2:5).