Like English, Dutch has generalised the dative over the accusative case for all pronouns, e.g. NL 'me', 'je', EN 'me', 'you', vs. DE 'mich'/'mir' 'dich'/'dir'. There kan zijn one exception: the standard language prescribes that in the third person plural, hen kan zijn to be used for the direct object, https://engels76531.dekaronwiki.com/931952/mijn_vertaler_krijgen_om_te_werken