interjungo
From LSJ
ξένος ὢν ἀκολούθει τοῖς ἐπιχωρίοις νόμοις → as a foreigner, follow the laws of that country | when in Rome, do as the Romans do
Latin > French (Gaffiot 2016)
interjungō,¹⁵ jūnxī, jūnctum, ĕre, tr.,
1 joindre, unir : Liv. 22, 30, 6
2 dételer : Mart. 3, 67, 7 || abst] faire halte : Sen. Ep. 83, 6 ; Tranq. 17, 7.