I would like to thank the people who volunteered to translate qBittorrent.
Most of them translated via Transifex and some of them are mentioned below:
(the list might not be up to date)

- Arabic: SDERAWI (abz8868@msn.com), sn51234 (nesseyan@gmail.com) and Ibrahim Saed ibraheem_alex(Transifex)
- Armenian: Hrant Ohanyan (hrantohanyan@mail.am)
- Basque: Xabier Aramendi (azpidatziak@gmail.com)
- Belarusian: Mihas Varantsou (meequz@gmail.com)
- Bulgarian: Tsvetan & Boyko Bankoff (emerge_life@users.sourceforge.net)
- Catalan: Francisco Luque Contreras (frannoe@ya.com)
- Chinese (Simplified): Guo Yue (yue.guo0418@gmail.com)
- Chinese (Traditional): Yi-Shun Wang (dnextstep@gmail.com) and 冥王歐西里斯 s8321414(Transifex)
- Croatian: Oliver Mucafir (oliver.untwist@gmail.com)
- Czech: Jirka Vilim (web@tets.cz) and Petr Cernobila abr(Transifex)
- Danish: Mathias Nielsen (comoneo@gmail.com), scootergrisen, Nicolaj (fuskern@gmail.com) and Joe Hansen (joedalton2@yahoo.dk)
- Dutch: Pieter Heyvaert (pieter_heyvaert@hotmail.com)
- English(Australia): Robert Readman readmanr(Transifex)
- English(United Kingdom): Robert Readman readmanr(Transifex)
- Finnish: Niklas Laxström (nikerabbit@users.sourceforge.net), Pekka Niemi (pekka.niemi@iki.fi) and Jiri Grönroos artnay(Transifex)
- Galician: Marcos Lans (marcoslansgarza@gmail.com) and antiparvos(Transifex)
- Georgian: Beqa Arabuli (arabulibeqa@yahoo.com)
- German: Niels Hoffmann (zentralmaschine@users.sourceforge.net), schnurlos (schnurlos@gmail.com)
- Greek: Tsvetan Bankov (emerge_life@users.sourceforge.net), Stephanos Antaris (santaris@csd.auth.gr), sledgehammer999(hammered999@gmail.com), Γιάννης Ανθυμίδης Evropi(Transifex) and Panagiotis Tabakis(tabakisp@gmail.com)
- Hebrew: David Deutsch (d.deffo@gmail.com)
- Hungarian: Majoros Péter (majoros.peterj@gmail.com)
- Italian: bovirus (bovirus@live.it) and Matteo Sechi (bu17714@gmail.com)
- Japanese: Masato Hashimoto (cabezon.hashimoto@gmail.com)
- Korean: Jin Woo Sin (jin828sin@users.sourceforge.net)
- Lithuanian: Naglis Jonaitis (njonaitis@gmail.com)
- Norwegian: Tomaso, Imre Kristoffer Eilertsen (imreeil42@gmail.com) and Kingu (Transifex)
- Polish: Mariusz Fik (fisiu@opensuse.org)
- Portuguese: Sérgio Marques smarquespt(Transifex), L.Sousa(Transifex), Hugo Carvalho (hugok Transifex)
- Portuguese(Brazil): Nick Marinho (nickmarinho@gmail.com)
- Romanian: Obada Denis (obadadenis@users.sourceforge.net), Adrian Gabor Adriannho(Transifex) and Mihai Coman z0id(Transifex)
- Russian: Nick Khazov (m2k3d0n at users.sourceforge.net), Alexey Morsov (samurai@ricom.ru), Nick Tiskov Dayman(daymansmail (at) gmail (dot) com), Dmitry DmitryKX(Transifex) and kraleksandr kraleksandr(Transifex)
- Serbian: Anaximandar Milet (anaximandar@operamail.com)
- Slovak: helix84
- Spanish: Alfredo Monclús (alfrix), Francisco Luque Contreras (frannoe@ya.com), José Antonio Moray moray33(Transifex) and Diego de las Heras(Transifex)
- Swedish: Daniel Nylander (po@danielnylander.se), Emil Hammarberg Ooglogput(Transifex) and Jonatan Nyberg jony08(Transifex)
- Turkish: Hasan YILMAZ (iletisim@hedefturkce.com), Erdem Bingöl (erdem84@gmail.com) and Burak Yavuz (BouRock)
- Ukrainian: Oleh Prypin (blaxpirit@gmail.com)
- Vietnamese: Anh Phan ppanhh(Transifex)

Please contact me if you would like to translate qBittorrent into your own language.