There are some useful settings in the file statamic/core/Search/Comb/Index.php:

...
'match_weights' => null,
'min_characters' => null,
'min_word_characters' => null,
'score_threshold' => null,
'property_weights' => null,
'query_mode' => null,
'use_stemming' => false,
'use_alternates' => false,
'include_full_query' => null,
'enable_too_many_results' => null,
'sort_by_score' => null,
'exclude_properties' => null,
'include_properties' => null,
'stop_words' => ['the', 'a', 'an'],
...

'

I would like to tweak those settings for the search in a specific collection with its own index (i.e. using German stop words).

How would I set those options in Statamic without editing the core files (in general and for a collection)?

Unfortunately I didn't find any details about this in the documentation or in the forum.

Thanks.