Yes, both s and d endings are quite right and are standardised in non-American English usage. American usage seems to allow for the d at least to be left off. The pronunciations in Britglish, AusEnglish and KiwiEnglish all allow for the d quite easily, more so that US English according to my bad fake Yankee accent test.

And from the English English perspective, we do standardise many of the words we appropriate, we like to make them feel at home in the language ;-)