marc fd65c12921 make search language handling less strict
languages.py can change, so users may query on a language that is not
on the list anymore, even if it is still recognized by a few engines.

also made no and nb the same because they seem to return the same,
though most engines will only support one or the other.
2017-03-18 23:44:21 +01:00
..
2016-11-19 21:18:12 +01:00
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