http://translatewiki.net/wiki/Thread:Support/Color_indicator_for_differences_or_non-matching_words_or_characters
http://translatewiki.net/wiki/Thread:Support/Color_indicator_for_differences_or_non-matching_words_or_characters
You mentioned making a feature request at bugzilla. How is that done?
AnakngAraw (talk)
http://www.mediawiki.org/wiki/Bugs#Reporting_a_bug
Select MediaWiki extensions as product and Translate extension as the component. Severity should be enhancement.