TYPO3 Core

ACK.
the field "languageField" (e.g. for tt_content: sys_language_uid) is set to -1 if you select "[All]"
But the select query ignores this setting and gets only one integer value set by TS:

class.tslib_content.php, function getWhere:

$sys_language_content = intval($GLOBALS['TSFE']->sys_language_content);

So you can never create a query like "AND sys_language_uid IN (0,-1)" because your setting
config.sys_language_uid = 0,-1
will be reset by intval to the value=0

possible fix where:
$sys_language_content = intval($GLOBALS['TSFE']->sys_language_content).',-1';

This issue seems to be caused by a wrong configuration. Refering to [1],[2] language behaviour can be changed by "config.sys_language_overlay". It's nonsense to set "config.sys_language_uid = 0,-1"!

[1] http://typo3.org/documentation/document-library/doc_core_tsref/quot_CONFIG_quot/
[2] tslib_fe::settingLanguage()

No error here.

There should be an explicit document about translations / localisation which describes all implications and a correct setup!