Language/Second language enhancements

[dorotawalker]

In issue #313 the field for the second language was created, but the drop down menu only has two: English and 'Deutsche' (which is pains Sabine as it's gramatically incorrect). We would like two enhancements to be made to both fields:

1. Drop down menu should contain native British languages in the following order:

Language	Language_Country_Variant code
English	en or en_GB
Welsh	cy or cy_GB
Scottish Gaelic	gd
Breton	br
Cornish	kw
Irish	ga
Manx	gv
Ulster Scots	sco_GB_ulster
Scots	sco or sco_GB
Shelta	sth
Other

We think adding all official languages as presented in the LoC authority list is not needed as would only add to the confusion.

1. As some (very few) websites are bilingual in other languages, for example in the 'French in London' collection, we need an option to type in a language. For example selectors could use an option 'Other' in the drop down menu, which would open a text field and give them an option of typing the required language.

[anjackson]

I'm trying to mark up these languages correctly using the ISO 639 standard and the information from here:

• http://docs.oracle.com/javase/7/docs/api/java/util/Locale.html
• http://www.iana.org/assignments/language-subtag-registry/language-subtag-registry
• https://en.wikipedia.org/wiki/List_of_ISO_639-1_codes (partial list)
• http://www.loc.gov/standards/iso639-2/php/English_list.php (full list? missing Shelta)
• http://www-01.sil.org/iso639-3/codes.asp (full list? Includes Shelta)

(Using alpha-2 code for preference, but switching to alpha-3 when there is no alpha-2 defined)