Hi
It seems that languages FRR is duplicate in iso-languagecodes.txt on line 1998 and 17, and the information is not the same : ISO 639-3 is empty and ISO 639-2 is frr on line 17, but it is the opposite for line 1998
same things for NQO RUP, SYC,SRN,ZBL,ZZA
is it possible to merge those lines ? the first 74 lines of the files seems to be recently added and they all have the iso 639-3 to null, i suggest to remove duplicate lines and move the iso 639-2 to iso 639-3 of the 74 first lines