Archived discussion at http://www.wikidata.org/wiki/Wikidata:Contact_the_development_team/Archive/2012/11#language_code_problems
als, be-x-old and zh-yue are not a valid language code that should be used for labels, aliases and descriptions. Instead gsw, be-tarask and yue are the valid lang codes.
You you also check the lang setting of these wikis: http://als.wikipedia.org/w/api.php?action=query&meta=siteinfo&siprop=general
Version: wmf-deployment
URL: https://meta.wikimedia.org/wiki/Special_language_codes
See Also:
T53071: Utils::getLanguageCodes() should filter [[mw:Manual:$wgDummyLanguageCodes]] out
T39459: [Task] Don't try to add labels in non-existing languages: restrict to Language::isKnownLanguageTag
T39754: Handling for missing language codes
T21986: [DO NOT USE] Wikis waiting to be renamed (tracking) [superseded by #Wiki-Setup (Rename)]
T101086: Standardize invalid language codes for Babel extension