A foreign marriage certificate needs a certified (Germany, Austria) or notarised (Switzerland) translation whenever a registry or immigration authority has to rely on it — for a name change, a residence permit based on the marriage, or naturalisation. Germany, Austria and Switzerland each recognise a different kind of certification and a different competent authority — see the comparison below before you order.
The translation has to come from a court-authorised (sworn) translator — in German an ermächtigter Übersetzer, authorised under Section 142 (3) ZPO — who adds a stamp, signature and certification note. Your own translation, or one without certification, is not accepted. termbase produces these certified translations into German; the exact list is set by your Standesamt, and we translate whatever they require.
UK marriage certificates come from three separate registers: the GRO for England & Wales, National Records of Scotland for a Scottish marriage, and GRO Northern Ireland for Belfast. The UK also has no state-sworn translator system — a "certified translation" produced there under a CIOL, ITI or ATC member's own statement of accuracy is self-certification, not a court appointment, and a German Standesamt does not accept it in place of a translation from an ermächtigter Übersetzer.