Downloads
Every dictionary is a single ZIP containing one folder. Unzip it, copy the folder onto your device, and restart KOReader. Nothing else is required, and nothing phones home.
Every dictionary below downloads directly from GitHub Releases.
Showing 53 of 53
- Arabic
ar-ar12,766 entries123,977 inflected forms1.1 MBCC-BY-SA-3.0 - Arabic → English
ar-en28,892 entries292,898 inflected forms4.3 MBCC-BY-SA-4.0 - Czech
cs-cs46,726 entries367,023 inflected forms5.6 MBCC-BY-SA-4.0 - Czech → English
cs-en54,439 entries501,190 inflected forms4.5 MBCC-BY-SA-4.0 - German
de-de181,914 entries846,356 inflected forms33.6 MBCC-BY-SA-4.0 - German → English
de-en125,898 entries664,700 inflected forms13.1 MBCC-BY-SA-4.0 - Greek
el-el452,197 entries1,115,322 inflected forms18.9 MBCC-BY-SA-4.0 - Greek → English
el-en62,934 entries405,403 inflected forms7.2 MBCC-BY-SA-4.0 - English → Arabic
en-ar155,624 entries323,610 inflected forms12.3 MBCC-BY-SA-4.0 - English → German
en-de67,375 entries187,321 inflected forms6.6 MBCC-BY-SA-4.0 - English → Greek
en-el158,536 entries329,527 inflected forms13.8 MBCC-BY-SA-4.0 - English
en-en815,066 entries1,494,986 inflected forms91.9 MBCC-BY-SA-4.0 - English → Spanish
en-es174,258 entries365,153 inflected forms15.3 MBCC-BY-SA-4.0 - English → Finnish
en-fi179,652 entries378,874 inflected forms17.9 MBCC-BY-SA-4.0 - English → French
en-fr84,803 entries127,148 inflected forms6.9 MBCECILL-C - English → Italian
en-it169,373 entries353,125 inflected forms14.2 MBCC-BY-SA-4.0 - English → Japanese
en-ja163,102 entries337,152 inflected forms15.4 MBCC-BY-SA-4.0 - English → Korean
en-ko25,985 entries76,501 inflected forms2.5 MBCC-BY-SA-4.0 - English → Dutch
en-nl162,346 entries339,608 inflected forms13.5 MBCC-BY-SA-4.0 - English → Polish
en-pl177,956 entries372,845 inflected forms15.4 MBCC-BY-SA-4.0 - English → Portuguese
en-pt172,842 entries362,335 inflected forms14.9 MBCC-BY-SA-4.0 - English → Russian
en-ru58,922 entries164,363 inflected forms6.2 MBCC-BY-SA-4.0 - English → Chinese
en-zh170,953 entries349,920 inflected forms15.2 MBCC-BY-SA-4.0 - Spanish → English
es-en129,570 entries1,104,382 inflected forms12.5 MBCC-BY-SA-4.0 - Spanish
es-es133,146 entries913,087 inflected forms11.7 MBCC-BY-SA-4.0 - Spanish → French
es-fr24,805 entries0 inflected forms2 MBCECILL-C - Spanish → Italian
es-it21,419 entries151,008 inflected forms2.7 MBCC-BY-SA-4.0 - Spanish → Portuguese
es-pt26,039 entries149,523 inflected forms3 MBCC-BY-SA-4.0 - Finnish → English
fi-en254,435 entries4,338,416 inflected forms27.2 MBCC-BY-SA-4.0 - French → English
fr-en55,323 entries0 inflected forms4.8 MBCECILL-C - French → Spanish
fr-es26,278 entries0 inflected forms2.3 MBCECILL-C - French
fr-fr514,854 entries1,917,624 inflected forms73.1 MBCC-BY-SA-4.0 - French → Italian
fr-it27,629 entries0 inflected forms2.5 MBCECILL-C - French → Portuguese
fr-pt28,505 entries136,156 inflected forms2.5 MBCC-BY-SA-4.0 - Italian → English
it-en167,851 entries926,953 inflected forms12.2 MBCC-BY-SA-4.0 - Italian → Spanish
it-es24,199 entries142,253 inflected forms2.5 MBCC-BY-SA-4.0 - Italian → French
it-fr33,181 entries0 inflected forms2.6 MBCECILL-C - Italian
it-it68,755 entries543,455 inflected forms6.5 MBCC-BY-SA-4.0 - Japanese → English
ja-en155,255 entries395,693 inflected forms14.5 MBCC-BY-SA-4.0 - Japanese
ja-ja111,345 entries510,652 inflected forms8.8 MBCC-BY-SA-4.0 - Korean → English
ko-en37,337 entries341,382 inflected forms3.4 MBCC-BY-SA-4.0 - Korean
ko-ko68,067 entries177,576 inflected forms3.6 MBCC-BY-SA-4.0 - Dutch → English
nl-en98,897 entries262,954 inflected forms9.2 MBCC-BY-SA-4.0 - Dutch
nl-nl195,662 entries535,894 inflected forms29.2 MBCC-BY-SA-4.0 - Polish → English
pl-en124,144 entries918,723 inflected forms12.9 MBCC-BY-SA-4.0 - Polish
pl-pl115,143 entries986,820 inflected forms13.1 MBCC-BY-SA-4.0 - Portuguese → English
pt-en102,769 entries412,172 inflected forms9.3 MBCC-BY-SA-4.0 - Portuguese → Spanish
pt-es36,505 entries128,109 inflected forms3 MBCC-BY-SA-4.0 - Portuguese → Italian
pt-it34,816 entries125,638 inflected forms3.1 MBCC-BY-SA-4.0 - Portuguese
pt-pt81,068 entries457,723 inflected forms6.6 MBCC-BY-SA-4.0 - Russian → English
ru-en82,549 entries844,108 inflected forms10.7 MBCC-BY-SA-4.0 - Russian
ru-ru450,168 entries2,793,616 inflected forms47.6 MBCC-BY-SA-4.0 - Chinese
zh-zh71,140 entries50,022 inflected forms5.5 MBCC-BY-SA-4.0
What is inside the ZIP
Each archive holds one dictionary folder with these files. You never need to open them, but it helps to know what they are:
.ifo- Metadata: the dictionary’s name, entry count, and the attribution notice shown in KOReader’s dictionary list.
.idx- The index of headwords, sorted so the reader can binary-search it.
.dict.dz- The definitions themselves, compressed so a phone or e-reader can seek into them without unpacking the whole file.
.syn- The inflection index: it maps wielded to wield and geese to goose. This is what makes lookups work on real prose.
LICENSE / ATTRIBUTION- The licence the compilation is distributed under, and the notices each source requires.
README.txt- Installation instructions, offline.
Why ZIP
The definitions are already compressed inside the archive, so the gain comes almost entirely from the two plain index files. We measured the alternatives on the 21.6 MB English-to-Portuguese build:
| Method | Size | Note |
|---|---|---|
| Stored | 21.6 MB | No compression. |
| ZIP (DEFLATE) | 15.1 MB | Opens on every operating system without extra software. |
| ZIP (bzip2) | 15.1 MB | No smaller, and not universally supported. |
| ZIP (LZMA) | 14.3 MB | 5% smaller, five times slower, and stock Windows Explorer and macOS Archive Utility cannot open it. |
Five percent is not worth handing you an archive your computer refuses to open, so every download is a plain ZIP.
Downloads are published on GitHub Releases and rebuilt on a schedule as the upstream sources change.