Issue #2195183 by cleaver, zopa, elgordogrande, sandykadam, jhodgdon, joachim, Eda: document Batch API callbacks as callback implementations

Issue #495930 by fietserwin: Translated strings not correctly marked in the administrative interface when the default language is not English

Issue #1664528 by Carl Johan: Fixed It's impossible to search for 'Strings not translated to language ...'.

Issue #1250800 by attiks, Jelle_S, dawehner, xjm, Gábor Hojtsy: Fixed Language domain should work regardless of ports or protocols.

Issue #655048 by Gábor Hojtsy, gumanist, intuited: Fixed Plural formula information blanked when importing a poorly-formed .po file.

Issue #278425 by andypost, droplet, OnkelTem, chx, c960657, drewish, kotnik, realityloop: Change notice for: Using basename() is not locale safe.

Issue #488496 by loganfsmyth, Gábor Hojtsy: Implement missing msgctx context in JS translation for feature parity with t().

Issue #221712 by Damien Tournoud, Gábor Hojtsy, iliphil, Bodo Maass, idflood, loganfsmyth: Fixed locale_language_from_browser() doesn't parse language tags correctly, has a broken logic.

Issue #1281932 by loganfsmyth, bfroehle, Gábor Hojtsy: Convert Drupal.t and Drupal.formatPlural regular expressions to extended form.

Issue #504506 by andypost, Gábor Hojtsy: Fixed Drupal.formatPlural incorrectly handle complex plural rules.

#860154 by Zoltán Balogh, zserno, Gábor Hojtsy: Fixed Locale module does not import the plural forms from compact files.

- Patch #611786 by Gábor Hojtsy, tobiasb, Pasqualle: .po file should not be considered broken if last msgstr is empty.

#282191 follow-up by plach: Remove ambitious parts of translatable fields UI from core that are no longer relevant, given what made it into Drupal 7.

- Patch #243251 by naxoc, Signe, lilou, mcarbone: JavaScript requiring a query string cannot be loaded.