CLI word list selection, by script or language tags

Users may want to manually select word lists on the CLI, instead of them all always being tested

Possible modes of selection to discuss:
* by name of word list e.g. "DiffenatorLatin"
* by script, e.g. "Latn"
* by language, e.g. "ar"

Start by locating the CLI entry point and the code that currently loads all word lists. Compare the proposed selection modes—word-list name, script, and language—and clarify which should be supported and how tags are represented. Done means the selected lists are tested instead of all lists, with behavior and selection syntax documented.

Written by the indexing model from the issue text.