According to E.1.1, under "uniform titles", language of expression is preceded by a period; other distinguishing characteristics of expression is enclosed in parentheses (and no period), and date of expression is preceded by a period. So:
De officio principium. $l German $s (Major). $f 1540
Bob
Suppose you have a work that is translated by the same person, twice. E.g. (from a reference source, Hartfelder, 309): “the tract was considered so significant that two separate German translations were produced by Georg Major in 1515 and 1540”. Would a fully and correctly formed access point for the expression that represents the second translation be:
240 10 $a De officio principium. $l German. $s (Major, 1540)
Or:
240 10 $a De officio principium $l German $s (Major) $f 1540
--Ben Abrahamse, MIT Libraries