To compile a word-list database which includes the available scattered word lists (mainly Swadesh lists), which language code should one use?
WALS with 2679 entries, lots of linguistic data included. (Maintained Max Planck Institute)
Glottolog with 7943 entries and also lots of data included. (Maintained Max Planck Institute)
Linguasphere with about 21000 entries and some info included from 2000 or 2011. Theoretically limit of 18.9 million entries, thus theoretically flexible to include dialects and historic languages. (as far as I can tell dormant, otherwise Linguasphere Observatory)
a different language code set all together?
I realise this is a bit of a subjective question but does anyone feel confident enough to say "this language code set should be used for the following reasons"?