[enh] filter non-existing language code/name containing requests
[enh] filter non-existing language code/name containing requests

dalf/searx,matejc/searx,asciimoo/searx,PwnArt1st/searx,misnyo/searx,jcherqui/searx,misnyo/searx,matejc/searx,jibe-b/searx,jcherqui/searx,jibe-b/searx,asciimoo/searx,potato/searx,potato/searx,jibe-b/searx,dalf/searx,potato/searx,matejc/searx,jcherqui/searx,jibe-b/searx,misnyo/searx,PwnArt1st/searx,jcherqui/searx,asciimoo/searx,matejc/searx,misnyo/searx,PwnArt1st/searx,potato/searx,dalf/searx,PwnArt1st/searx,dalf/searx,asciimoo/searx