d'ailleurs bedeutet auf Englisch

moreover▼◼◼◼(in addition to what has been said)
adverb
[UK: mɔː.ˈrəʊ.və(r)] [US: mɔːˈro.ʊ.və(r)]

besides▼◼◼◼(moreover; furthermore)
adverb
[UK: bɪ.ˈsaɪdz] [US: bə.ˈsaɪdz]

anyway▼◼◼◼(used to indicate that a statement explains or supports a previous statement)
adverb
[UK: ˈe.ni.weɪ] [US: ˈe.ni.ˌwe]

by the way▼◼◼◼(incidentally)
preposition
[UK: baɪ ðə ˈweɪ] [US: baɪ ðə ˈweɪ]