All Wiktionaries (edit)
As of May 2009, there are versions of the Wiktionary in 172 different languages [1] (almost the same as the number of Wikipedias), although only 63 of those are considered fairly active.
1 000 000+
English (en), Français (fr)
100 000+ Ελληνικά (el), Suomi (fi), Magyar (hu), Ido (io), Italiano (it), Lietuvių (lt), Norsk (Bokmål) (no), Polski (pl), Русский (ru), Türkçe (tr), Tiếng Việt (vi), 中文 (zh)
10 000+ Afrikaans (af), ويكاموس (ar), Български (bg), Brezhoneg (br), Català (ca), Čeština (cs), Deutsch (de), Español (es), Eesti (et), فارسى (fa), Frysk (fy), Galego (gl), Bahasa Indonesia (id), Íslenska (is), 日本語 (ja), 한국어 (ko), Kurdî / كوردی (ku), Limburgs (li), ລາວ (lo), മലയാളം (ml), Nederlands (nl), Occitan (oc), Português (pt), Română (ro), Sicilianu (scn), Српски / Srpski (sr), Simple English (simple), Svenska (sv), Kiswahili (sw), தமிழ் (ta), తెలుగు (te), ไทย (th), Українська (uk), Volapük (vo)
1000+ Æld Englisc (ang), Asturianu (ast), Corsu (co), Dansk (da), עברית (he), हिन्दी (hi), Hrvatski (hr), Obersorbisch (hsb), Հայերեն (hy), Қазақ (kk), ಕನ್ನಡ (kn), Latina (la), Plattdüütsch (nds), Slovenčina (sk), Slovenščina (sl), Shqip (sq), تركمن / Туркмен (tk), Tatarça / Татарча (tt), اردو (ur), Walloon (wa), Bân-lâm-gú / Hō-ló-oē (zh-min-nan)
100+ Bosanski – Cymraeg – Esperanto – ગુજરાતી – Interlingua – Interlingue – Македонски – سنڌي / सिन्धी – Українська – ייִדיש / Yiddisch