From Japanese-German FreeDict Dictionary ver. 0.2.0:
[ichi1] [news1] [nf01] 二 /(en)tʃˈaɪniːz(ja)lˈe̞tə/, ２, 弐 /(en)tʃˈaɪniːz(ja)lˈe̞tə/, (word containing out-dated kanji) 貳 /(en)tʃˈaɪniːz(ja)lˈe̞tə/, (word containing out-dated kanji) 貮 /(en)tʃˈaɪniːz(ja)lˈe̞tə/, [ichi1] [news1] [nf01] に /nˈi/, ふた /ɸˈɯᵝtä/, ふ /ɸˈɯᵝ/, ふう /ɸˈɯᵝɯᵝ/
(numeric)
(ふ and ふう used mainly when counting aloud. 弐, 貳 and 貮 are used in legal documents.)
zwei, zwei, 2, zwei (in Dokumenten)