tails-security-check doesn't support language codes with 3 characters

Line 60 of tails-security-check seems to assume that the language part of a locale code is 3 characters long:

    my ($code) = ($ENV{LANG} =~ m/([a-z]{2}).*/);

Some language codes are 3 characters long. For example, in /usr/share/locale/:

• ace
• ach
• ang
• anp
• ast
• bal
• bar
• brx
• byn
• chr
• etc.

Related issues

• Related to #17002 (closed)
• Is duplicate of #6001

Original created by @sajolida on 17003 (Redmine)