There are two independant messages saying "try beta" in English.
Thses are: MediaWiki:Optin-try and MediaWiki:Optin-accept-long
They are not immediately intelligible but as opposed to the more understandable messages near then, they lack a tooltip.
Also, "Beta" is an English term which cannot be translated to some languages.
See also http://www.mediawiki.org/wiki/I18n#Expect_untranslated_words
With proper language tagging, it shows up as
- <i lang="en">Beta</i> ußprobeere
e.g. on kshwiki. That needs to be corrected.
Version: unspecified
Severity: enhancement
URL: http://ksh.wikipedia.org/?useskin=vector