This is a crude tool that reads a local copy of a iso-639-3_Name_Index_YYYYMMDD.tab file from sil.org and extracts the information necessary to create the data table held by Module:ISO 639 name/ISO_639-3
To use this tool:
{{#invoke:}}
into it at the top line:
{{#invoke:ISO 639 name/ISO 639-3/make|ISO_639_3_extract|file-date=YYYYMMDD}}
{{#invoke:}}
There is some crude error checking that will insert an error message in the output. No guarantees that such messaging will be helpful. Search for the word 'error' in the tool's output.