The Hebrew and Greek that is translated as “witness” in English is translated as “truly have seen” in Highland Popoluca, as “telling the truth regarding something” (Eastern Highland Otomi), as “know something” in Lalana Chinantec, as “verily know something to be the truth” in San Mateo del Mar Huave, as “we ourselves saw this,” in Desano, as “tell the truth about something” in Eastern Highland Otomi, as “know something is true because of seeing it” in Teutila Cuicatec. (Source: Viola Waterhouse in Notes on Translation August 1966, p. 86ff.)
Many languages distinguish between inclusive and exclusive first-person plural pronouns (“we”). The inclusive “we” specifically includes the addressee (“you and I and possibly others”), while the exclusive “we” specifically excludes the addressee (“he/she/they and I, but not you”). This grammatical distinction is called “clusivity.” While Semitic languages such as Hebrew or most Indo-European languages such as Greek or English do not make that distinction, translators of languages with that distinction have to make a choice every time they encounter “we” or a form thereof (in English: “we,” “our,” or “us”).