Wikipedia:Milestone statistics

Milestone	Languages (dates milestones reached, in order of reaching them)
2 000 000	English (9 September 2007)
1 000 000
500 000	German (23 November 2006); French (28 May 2007)
200 000	Polish (26 January 2006); Japanese (9 April 2006); Dutch (24 May 2006); Italian (27 September 2006); Portuguese (30 November 2006); Swedish (23 December 2006); Spanish (10 February 2007); Russian (4 September 2007)
100 000	Chinese (12 November 2006); Finnish (11 February 2007); Norwegian (Bokmål) (24 February 2007); Volapük (7 September 2007); Romanian (11 January 2008); Catalan (18 January 2008)
50 000	Esperanto (8 July 2006); Slovak (6 August 2006); Danish (30 September 2006); Czech (18 November 2006); Hebrew (24 December 2006); Ukrainian (16 January 2007); Indonesian (1 February 2007); Hungarian (7 February 2007); Turkish (9 March 2007); Slovenian (18 July 2007); Lithuanian (1 August 2007); Serbian (22 August 2007); Bulgarian (26 December 2007); Arabic (31 December 2007); Korean (4 January 2008)
20 000	Estonian (22 July 2006); Croatian (11 August 2006); Telugu (13 October 2006); Galician (6 December 2006); Cebuano (2 February 2007); Norwegian (Nynorsk) (4 February 2007); Thai (16 March 2007); Greek (17 March 2007); Persian (23 April 2007); Malay (27 April 2007); Newar / Nepal Bhasa (13 June 2007); Vietnamese (17 June 2007); Bishnupriya Manipuri (16 August 2007); Bosnian (30 August 2007); Basque (11 September 2007); Simple English (16 October 2007)
10 000	Ido (24 October 2005); Icelandic (6 May 2006); Neapolitan (17 June 2006); Luxembourgish (23 July 2006); Georgian (11 August 2006); Bengali (26 September 2006); Breton (1 November 2006); Albanian (23 November 2006); Latin (29 December 2006); Lombard (27 Feb 2007); Hindi (14 March 2007); Serbo-Croatian (10 April 2007); Sundanese (13 April 2007); Tamil (27 April 2007); Javanese (3 May 2007); Marathi (26 May 2007); Macedonian (22 June 2007); Welsh (23 June 2007); Low Saxon (2 July 2007); Sicilian (6 July 2007); Latvian (19 July 2007) ; Azeri (22 July 2007); Occitan (11 September 2007); Kurdish (19 September 2007); Piedmontese (2 October 2007); Tagalog (20 October 2007); Asturian (20 November 2007)
5 000	Walloon (9 June 2005); Afrikaans (24 March 2006); Haitian (11 August 2006); Uzbek (20 August 2006); Ripuarian (24 October 2006); Corsican (22 December 2006); Aragonese (29 December 2006); Chuvash (12 January 2007); Tajik (30 January 2007); Urdu (15 March 2007); Old Belarusian (27 March 2007); Irish (7 May 2007); Belarusian (23 May 2007); Venetian (3 July 2007); Swahili (11 July 2007); West Frisian (25 July 2007); Tarantino (2 August 2007); Maori (10 September 2007); Cantonese (23 September 2007); Quechua (31 October 2007); Malayalam (12 December 2007); Kannada (27 December 2007); Yoruba (3 January 2008)
2 000	Tatar (5 November 2004); Interlingua (19 June 2005); Limburgish (17 May 2006); Alemannic (6 June 2006); Scottish Gaelic (13 July 2006); Yiddish (25 July 2006); Armenian (13 August 2006); Ilokano (15 September 2006); Faroese (7 October 2006); Min Nan (11 October 2006); Norman (14 November 2006); Amharic (22 December 2006); Dutch Low Saxon (11 January 2007); Kapampangan (19 January 2007); Sanskrit (13 February 2007); Waray-Waray (13 February 2007); Friulian (22 April 2007); Bhojpuri/Bihari (29 April 2007); Banyumasan (7 May 2007); Northern Sami (15 May 2007); Novial (20 May 2007); Pali (7 June 2007); Upper Sorbian (20 June 2007); Samogitian (27 June 2007); Pangasinan (8 July 2007); Nahuatl (26 July 2007); Scots (18 August 2007); West Flemish (27 August 2007); Ligurian (2 November 2007); Nepali (14 November 2007); Aromanian (22 December 2007); Divehi (28 December 2007)
1 000	Ossetian (20 May 2005); Cornish (8 April 2006); Franco-Provençal / Arpitan (17 May 2006); Ladino (13 September 2006); Pennsylvania German (16 October 2006); Maltese (20 December 2006); Voro (4 January 2007); Zazaki (14 January 2007); Kashubian (16 February 2007); Classical Chinese (4 April 2007); Tongan (25 April 2007); Pashto (5 August 2007); Bavarian (16 August 2007); Kazakh (3 October 2007); Romansh (27 October 2007); Mongolian (24 November 2007); Lingala (1 December 2007); Anglo-Saxon (29 December 2007)